diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62d2b88fb..492551aba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,23 @@ and Yorkie adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 
 ## [Unreleased]
 
+## [0.5.0] - 2024-09-05
+
+### Added
+
+- Add Concurrency Tests between Array Operations by @cloneot in https://github.com/yorkie-team/yorkie/pull/985
+- Add metric for WatchDocument streams by @emplam27 in https://github.com/yorkie-team/yorkie/pull/998
+- Add Account Deletion and Change Password to CLI by @sigmaith in https://github.com/yorkie-team/yorkie/pull/983
+
+### Changed
+
+- Optimize FindChangeInfosBetweenServerSeqs to prevent unnecessary Query by @kokodak in https://github.com/yorkie-team/yorkie/pull/974
+- Rename SetByIndex to ArraySet by @hackerwins in https://github.com/yorkie-team/yorkie/pull/995
+
+### Fixed
+
+- Set `updated_at` with `created_at` when creating Document by @window9u in https://github.com/yorkie-team/yorkie/pull/977
+
 ## [0.4.31] - 2024-08-21
 
 ### Added
diff --git a/Makefile b/Makefile
index a4ae4862c..b0ec6bc58 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-YORKIE_VERSION := 0.4.31
+YORKIE_VERSION := 0.5.0
 
 GO_PROJECT = github.com/yorkie-team/yorkie
 
diff --git a/admin/client.go b/admin/client.go
index fddf21044..1883d032b 100644
--- a/admin/client.go
+++ b/admin/client.go
@@ -377,3 +377,30 @@ func withShardKey[T any](conn *connect.Request[T], keys ...string) *connect.Requ
 
 	return conn
 }
+
+// DeleteAccount deletes the user's account.
+func (c *Client) DeleteAccount(ctx context.Context, username, password string) error {
+	_, err := c.client.DeleteAccount(ctx, connect.NewRequest(&api.DeleteAccountRequest{
+		Username: username,
+		Password: password,
+	}))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// ChangePassword changes the user's password.
+func (c *Client) ChangePassword(ctx context.Context, username, password, newPassword string) error {
+	_, err := c.client.ChangePassword(ctx, connect.NewRequest(&api.ChangePasswordRequest{
+		Username:        username,
+		CurrentPassword: password,
+		NewPassword:     newPassword,
+	}))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
diff --git a/api/converter/from_pb.go b/api/converter/from_pb.go
index 450403a42..4200da4d7 100644
--- a/api/converter/from_pb.go
+++ b/api/converter/from_pb.go
@@ -208,6 +208,8 @@ func FromOperations(pbOps []*api.Operation) ([]operations.Operation, error) {
 			op, err = fromTreeEdit(decoded.TreeEdit)
 		case *api.Operation_TreeStyle_:
 			op, err = fromTreeStyle(decoded.TreeStyle)
+		case *api.Operation_ArraySet_:
+			op, err = fromArraySet(decoded.ArraySet)
 		default:
 			return nil, ErrUnsupportedOperation
 		}
@@ -539,6 +541,31 @@ func fromTreeStyle(pbTreeStyle *api.Operation_TreeStyle) (*operations.TreeStyle,
 	), nil
 }
 
+func fromArraySet(pbSetByIndex *api.Operation_ArraySet) (*operations.ArraySet, error) {
+	parentCreatedAt, err := fromTimeTicket(pbSetByIndex.ParentCreatedAt)
+	if err != nil {
+		return nil, err
+	}
+	createdAt, err := fromTimeTicket(pbSetByIndex.CreatedAt)
+	if err != nil {
+		return nil, err
+	}
+	elem, err := fromElement(pbSetByIndex.Value)
+	if err != nil {
+		return nil, err
+	}
+	executedAt, err := fromTimeTicket(pbSetByIndex.ExecutedAt)
+	if err != nil {
+		return nil, err
+	}
+	return operations.NewArraySet(
+		parentCreatedAt,
+		createdAt,
+		elem,
+		executedAt,
+	), nil
+}
+
 func fromCreatedAtMapByActor(
 	pbCreatedAtMapByActor map[string]*api.TimeTicket,
 ) (map[string]*time.Ticket, error) {
diff --git a/api/converter/to_pb.go b/api/converter/to_pb.go
index 24d90b093..601db864d 100644
--- a/api/converter/to_pb.go
+++ b/api/converter/to_pb.go
@@ -206,6 +206,8 @@ func ToOperations(ops []operations.Operation) ([]*api.Operation, error) {
 			pbOperation.Body, err = toTreeEdit(op)
 		case *operations.TreeStyle:
 			pbOperation.Body, err = toTreeStyle(op)
+		case *operations.ArraySet:
+			pbOperation.Body, err = toArraySet(op)
 		default:
 			return nil, ErrUnsupportedOperation
 		}
@@ -375,6 +377,22 @@ func toTreeStyle(style *operations.TreeStyle) (*api.Operation_TreeStyle_, error)
 	}, nil
 }
 
+func toArraySet(setByIndex *operations.ArraySet) (*api.Operation_ArraySet_, error) {
+	pbElem, err := toJSONElementSimple(setByIndex.Value())
+	if err != nil {
+		return nil, err
+	}
+
+	return &api.Operation_ArraySet_{
+		ArraySet: &api.Operation_ArraySet{
+			ParentCreatedAt: ToTimeTicket(setByIndex.ParentCreatedAt()),
+			CreatedAt:       ToTimeTicket(setByIndex.CreatedAt()),
+			Value:           pbElem,
+			ExecutedAt:      ToTimeTicket(setByIndex.ExecutedAt()),
+		},
+	}, nil
+}
+
 func toJSONElementSimple(elem crdt.Element) (*api.JSONElementSimple, error) {
 	switch elem := elem.(type) {
 	case *crdt.Object:
diff --git a/api/docs/yorkie.base.yaml b/api/docs/yorkie.base.yaml
index 43e17e27d..cc22f1f9f 100644
--- a/api/docs/yorkie.base.yaml
+++ b/api/docs/yorkie.base.yaml
@@ -2,7 +2,7 @@ openapi: 3.1.0
 info:
   title: Yorkie
   description: "Yorkie is an open source document store for building collaborative editing applications."
-  version: v0.4.31
+  version: v0.5.0
 servers:
   - url: https://api.yorkie.dev
     description: Production server
diff --git a/api/docs/yorkie/v1/admin.openapi.yaml b/api/docs/yorkie/v1/admin.openapi.yaml
index bee1b82fb..f7918424a 100644
--- a/api/docs/yorkie/v1/admin.openapi.yaml
+++ b/api/docs/yorkie/v1/admin.openapi.yaml
@@ -3,7 +3,7 @@ info:
   description: Yorkie is an open source document store for building collaborative
     editing applications.
   title: Yorkie
-  version: v0.4.31
+  version: v0.5.0
 servers:
 - description: Production server
   url: https://api.yorkie.dev
@@ -1171,6 +1171,12 @@ components:
           description: ""
           title: add
           type: object
+        arraySet:
+          $ref: '#/components/schemas/yorkie.v1.Operation.ArraySet'
+          additionalProperties: false
+          description: ""
+          title: array_set
+          type: object
         edit:
           $ref: '#/components/schemas/yorkie.v1.Operation.Edit'
           additionalProperties: false
@@ -1257,6 +1263,36 @@ components:
           type: object
       title: Add
       type: object
+    yorkie.v1.Operation.ArraySet:
+      additionalProperties: false
+      description: ""
+      properties:
+        createdAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: created_at
+          type: object
+        executedAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: executed_at
+          type: object
+        parentCreatedAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: parent_created_at
+          type: object
+        value:
+          $ref: '#/components/schemas/yorkie.v1.JSONElementSimple'
+          additionalProperties: false
+          description: ""
+          title: value
+          type: object
+      title: ArraySet
+      type: object
     yorkie.v1.Operation.Edit:
       additionalProperties: false
       description: ""
diff --git a/api/docs/yorkie/v1/resources.openapi.yaml b/api/docs/yorkie/v1/resources.openapi.yaml
index 32854957d..d893c2398 100644
--- a/api/docs/yorkie/v1/resources.openapi.yaml
+++ b/api/docs/yorkie/v1/resources.openapi.yaml
@@ -3,7 +3,7 @@ info:
   description: Yorkie is an open source document store for building collaborative
     editing applications.
   title: Yorkie
-  version: v0.4.31
+  version: v0.5.0
 servers:
 - description: Production server
   url: https://api.yorkie.dev
@@ -680,6 +680,12 @@ components:
           description: ""
           title: add
           type: object
+        arraySet:
+          $ref: '#/components/schemas/yorkie.v1.Operation.ArraySet'
+          additionalProperties: false
+          description: ""
+          title: array_set
+          type: object
         edit:
           $ref: '#/components/schemas/yorkie.v1.Operation.Edit'
           additionalProperties: false
@@ -766,6 +772,36 @@ components:
           type: object
       title: Add
       type: object
+    yorkie.v1.Operation.ArraySet:
+      additionalProperties: false
+      description: ""
+      properties:
+        createdAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: created_at
+          type: object
+        executedAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: executed_at
+          type: object
+        parentCreatedAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: parent_created_at
+          type: object
+        value:
+          $ref: '#/components/schemas/yorkie.v1.JSONElementSimple'
+          additionalProperties: false
+          description: ""
+          title: value
+          type: object
+      title: ArraySet
+      type: object
     yorkie.v1.Operation.Edit:
       additionalProperties: false
       description: ""
diff --git a/api/docs/yorkie/v1/yorkie.openapi.yaml b/api/docs/yorkie/v1/yorkie.openapi.yaml
index 6e2ca097c..1f29856aa 100644
--- a/api/docs/yorkie/v1/yorkie.openapi.yaml
+++ b/api/docs/yorkie/v1/yorkie.openapi.yaml
@@ -3,7 +3,7 @@ info:
   description: Yorkie is an open source document store for building collaborative
     editing applications.
   title: Yorkie
-  version: v0.4.31
+  version: v0.5.0
 servers:
 - description: Production server
   url: https://api.yorkie.dev
@@ -664,6 +664,12 @@ components:
           description: ""
           title: add
           type: object
+        arraySet:
+          $ref: '#/components/schemas/yorkie.v1.Operation.ArraySet'
+          additionalProperties: false
+          description: ""
+          title: array_set
+          type: object
         edit:
           $ref: '#/components/schemas/yorkie.v1.Operation.Edit'
           additionalProperties: false
@@ -750,6 +756,36 @@ components:
           type: object
       title: Add
       type: object
+    yorkie.v1.Operation.ArraySet:
+      additionalProperties: false
+      description: ""
+      properties:
+        createdAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: created_at
+          type: object
+        executedAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: executed_at
+          type: object
+        parentCreatedAt:
+          $ref: '#/components/schemas/yorkie.v1.TimeTicket'
+          additionalProperties: false
+          description: ""
+          title: parent_created_at
+          type: object
+        value:
+          $ref: '#/components/schemas/yorkie.v1.JSONElementSimple'
+          additionalProperties: false
+          description: ""
+          title: value
+          type: object
+      title: ArraySet
+      type: object
     yorkie.v1.Operation.Edit:
       additionalProperties: false
       description: ""
diff --git a/api/yorkie/v1/resources.pb.go b/api/yorkie/v1/resources.pb.go
index ad76f5ca0..24899754d 100644
--- a/api/yorkie/v1/resources.pb.go
+++ b/api/yorkie/v1/resources.pb.go
@@ -529,6 +529,7 @@ type Operation struct {
 	//	*Operation_Increase_
 	//	*Operation_TreeEdit_
 	//	*Operation_TreeStyle_
+	//	*Operation_ArraySet_
 	Body isOperation_Body `protobuf_oneof:"body"`
 }
 
@@ -641,6 +642,13 @@ func (x *Operation) GetTreeStyle() *Operation_TreeStyle {
 	return nil
 }
 
+func (x *Operation) GetArraySet() *Operation_ArraySet {
+	if x, ok := x.GetBody().(*Operation_ArraySet_); ok {
+		return x.ArraySet
+	}
+	return nil
+}
+
 type isOperation_Body interface {
 	isOperation_Body()
 }
@@ -685,6 +693,10 @@ type Operation_TreeStyle_ struct {
 	TreeStyle *Operation_TreeStyle `protobuf:"bytes,10,opt,name=tree_style,json=treeStyle,proto3,oneof"`
 }
 
+type Operation_ArraySet_ struct {
+	ArraySet *Operation_ArraySet `protobuf:"bytes,11,opt,name=array_set,json=arraySet,proto3,oneof"`
+}
+
 func (*Operation_Set_) isOperation_Body() {}
 
 func (*Operation_Add_) isOperation_Body() {}
@@ -705,6 +717,8 @@ func (*Operation_TreeEdit_) isOperation_Body() {}
 
 func (*Operation_TreeStyle_) isOperation_Body() {}
 
+func (*Operation_ArraySet_) isOperation_Body() {}
+
 type JSONElementSimple struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3007,6 +3021,77 @@ func (x *Operation_TreeStyle) GetCreatedAtMapByActor() map[string]*TimeTicket {
 	return nil
 }
 
+type Operation_ArraySet struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ParentCreatedAt *TimeTicket        `protobuf:"bytes,1,opt,name=parent_created_at,json=parentCreatedAt,proto3" json:"parent_created_at,omitempty"`
+	CreatedAt       *TimeTicket        `protobuf:"bytes,2,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
+	Value           *JSONElementSimple `protobuf:"bytes,3,opt,name=value,proto3" json:"value,omitempty"`
+	ExecutedAt      *TimeTicket        `protobuf:"bytes,4,opt,name=executed_at,json=executedAt,proto3" json:"executed_at,omitempty"`
+}
+
+func (x *Operation_ArraySet) Reset() {
+	*x = Operation_ArraySet{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_yorkie_v1_resources_proto_msgTypes[38]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Operation_ArraySet) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Operation_ArraySet) ProtoMessage() {}
+
+func (x *Operation_ArraySet) ProtoReflect() protoreflect.Message {
+	mi := &file_yorkie_v1_resources_proto_msgTypes[38]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Operation_ArraySet.ProtoReflect.Descriptor instead.
+func (*Operation_ArraySet) Descriptor() ([]byte, []int) {
+	return file_yorkie_v1_resources_proto_rawDescGZIP(), []int{4, 10}
+}
+
+func (x *Operation_ArraySet) GetParentCreatedAt() *TimeTicket {
+	if x != nil {
+		return x.ParentCreatedAt
+	}
+	return nil
+}
+
+func (x *Operation_ArraySet) GetCreatedAt() *TimeTicket {
+	if x != nil {
+		return x.CreatedAt
+	}
+	return nil
+}
+
+func (x *Operation_ArraySet) GetValue() *JSONElementSimple {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *Operation_ArraySet) GetExecutedAt() *TimeTicket {
+	if x != nil {
+		return x.ExecutedAt
+	}
+	return nil
+}
+
 type JSONElement_JSONObject struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3021,7 +3106,7 @@ type JSONElement_JSONObject struct {
 func (x *JSONElement_JSONObject) Reset() {
 	*x = JSONElement_JSONObject{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[45]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[46]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3034,7 +3119,7 @@ func (x *JSONElement_JSONObject) String() string {
 func (*JSONElement_JSONObject) ProtoMessage() {}
 
 func (x *JSONElement_JSONObject) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[45]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[46]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3092,7 +3177,7 @@ type JSONElement_JSONArray struct {
 func (x *JSONElement_JSONArray) Reset() {
 	*x = JSONElement_JSONArray{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[46]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[47]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3105,7 +3190,7 @@ func (x *JSONElement_JSONArray) String() string {
 func (*JSONElement_JSONArray) ProtoMessage() {}
 
 func (x *JSONElement_JSONArray) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[46]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[47]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3164,7 +3249,7 @@ type JSONElement_Primitive struct {
 func (x *JSONElement_Primitive) Reset() {
 	*x = JSONElement_Primitive{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[47]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[48]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3177,7 +3262,7 @@ func (x *JSONElement_Primitive) String() string {
 func (*JSONElement_Primitive) ProtoMessage() {}
 
 func (x *JSONElement_Primitive) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[47]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[48]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3242,7 +3327,7 @@ type JSONElement_Text struct {
 func (x *JSONElement_Text) Reset() {
 	*x = JSONElement_Text{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[48]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[49]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3255,7 +3340,7 @@ func (x *JSONElement_Text) String() string {
 func (*JSONElement_Text) ProtoMessage() {}
 
 func (x *JSONElement_Text) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[48]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[49]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3314,7 +3399,7 @@ type JSONElement_Counter struct {
 func (x *JSONElement_Counter) Reset() {
 	*x = JSONElement_Counter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[49]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[50]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3327,7 +3412,7 @@ func (x *JSONElement_Counter) String() string {
 func (*JSONElement_Counter) ProtoMessage() {}
 
 func (x *JSONElement_Counter) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[49]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[50]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3392,7 +3477,7 @@ type JSONElement_Tree struct {
 func (x *JSONElement_Tree) Reset() {
 	*x = JSONElement_Tree{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[50]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[51]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3405,7 +3490,7 @@ func (x *JSONElement_Tree) String() string {
 func (*JSONElement_Tree) ProtoMessage() {}
 
 func (x *JSONElement_Tree) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[50]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[51]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3460,7 +3545,7 @@ type UpdatableProjectFields_AuthWebhookMethods struct {
 func (x *UpdatableProjectFields_AuthWebhookMethods) Reset() {
 	*x = UpdatableProjectFields_AuthWebhookMethods{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_yorkie_v1_resources_proto_msgTypes[53]
+		mi := &file_yorkie_v1_resources_proto_msgTypes[54]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3473,7 +3558,7 @@ func (x *UpdatableProjectFields_AuthWebhookMethods) String() string {
 func (*UpdatableProjectFields_AuthWebhookMethods) ProtoMessage() {}
 
 func (x *UpdatableProjectFields_AuthWebhookMethods) ProtoReflect() protoreflect.Message {
-	mi := &file_yorkie_v1_resources_proto_msgTypes[53]
+	mi := &file_yorkie_v1_resources_proto_msgTypes[54]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3556,7 +3641,7 @@ var file_yorkie_v1_resources_proto_rawDesc = []byte{
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+	0x74, 0x52, 0x0f, 0x70, 0x61, 0x72, 0x65, 0x6e, 0x74, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64,
+	0x41, 0x74, 0x12, 0x34, 0x0a, 0x0a, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64, 0x5f, 0x61, 0x74,
+	0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x15, 0x2e, 0x79, 0x6f, 0x72, 0x6b, 0x69, 0x65, 0x2e,
+	0x76, 0x31, 0x2e, 0x54, 0x69, 0x6d, 0x65, 0x54, 0x69, 0x63, 0x6b, 0x65, 0x74, 0x52, 0x09, 0x63,
+	0x72, 0x65, 0x61, 0x74, 0x65, 0x64, 0x41, 0x74, 0x12, 0x32, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75,
+	0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1c, 0x2e, 0x79, 0x6f, 0x72, 0x6b, 0x69, 0x65,
+	0x2e, 0x76, 0x31, 0x2e, 0x4a, 0x53, 0x4f, 0x4e, 0x45, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x53,
+	0x69, 0x6d, 0x70, 0x6c, 0x65, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x12, 0x36, 0x0a, 0x0b,
+	0x65, 0x78, 0x65, 0x63, 0x75, 0x74, 0x65, 0x64, 0x5f, 0x61, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28,
+	0x0b, 0x32, 0x15, 0x2e, 0x79, 0x6f, 0x72, 0x6b, 0x69, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x54, 0x69,
+	0x6d, 0x65, 0x54, 0x69, 0x63, 0x6b, 0x65, 0x74, 0x52, 0x0a, 0x65, 0x78, 0x65, 0x63, 0x75, 0x74,
+	0x65, 0x64, 0x41, 0x74, 0x42, 0x06, 0x0a, 0x04, 0x62, 0x6f, 0x64, 0x79, 0x22, 0xf1, 0x01, 0x0a,
 	0x11, 0x4a, 0x53, 0x4f, 0x4e, 0x45, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x53, 0x69, 0x6d, 0x70,
 	0x6c, 0x65, 0x12, 0x34, 0x0a, 0x0a, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64, 0x5f, 0x61, 0x74,
 	0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x15, 0x2e, 0x79, 0x6f, 0x72, 0x6b, 0x69, 0x65, 0x2e,
@@ -4203,7 +4307,7 @@ func file_yorkie_v1_resources_proto_rawDescGZIP() []byte {
 }
 
 var file_yorkie_v1_resources_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
-var file_yorkie_v1_resources_proto_msgTypes = make([]protoimpl.MessageInfo, 55)
+var file_yorkie_v1_resources_proto_msgTypes = make([]protoimpl.MessageInfo, 56)
 var file_yorkie_v1_resources_proto_goTypes = []interface{}{
 	(ValueType)(0),                 // 0: yorkie.v1.ValueType
 	(DocEventType)(0),              // 1: yorkie.v1.DocEventType
@@ -4246,25 +4350,26 @@ var file_yorkie_v1_resources_proto_goTypes = []interface{}{
 	(*Operation_Increase)(nil),     // 38: yorkie.v1.Operation.Increase
 	(*Operation_TreeEdit)(nil),     // 39: yorkie.v1.Operation.TreeEdit
 	(*Operation_TreeStyle)(nil),    // 40: yorkie.v1.Operation.TreeStyle
-	nil,                            // 41: yorkie.v1.Operation.Edit.CreatedAtMapByActorEntry
-	nil,                            // 42: yorkie.v1.Operation.Edit.AttributesEntry
-	nil,                            // 43: yorkie.v1.Operation.Style.AttributesEntry
-	nil,                            // 44: yorkie.v1.Operation.Style.CreatedAtMapByActorEntry
-	nil,                            // 45: yorkie.v1.Operation.TreeEdit.CreatedAtMapByActorEntry
-	nil,                            // 46: yorkie.v1.Operation.TreeStyle.AttributesEntry
-	nil,                            // 47: yorkie.v1.Operation.TreeStyle.CreatedAtMapByActorEntry
-	(*JSONElement_JSONObject)(nil), // 48: yorkie.v1.JSONElement.JSONObject
-	(*JSONElement_JSONArray)(nil),  // 49: yorkie.v1.JSONElement.JSONArray
-	(*JSONElement_Primitive)(nil),  // 50: yorkie.v1.JSONElement.Primitive
-	(*JSONElement_Text)(nil),       // 51: yorkie.v1.JSONElement.Text
-	(*JSONElement_Counter)(nil),    // 52: yorkie.v1.JSONElement.Counter
-	(*JSONElement_Tree)(nil),       // 53: yorkie.v1.JSONElement.Tree
-	nil,                            // 54: yorkie.v1.TextNode.AttributesEntry
-	nil,                            // 55: yorkie.v1.TreeNode.AttributesEntry
-	(*UpdatableProjectFields_AuthWebhookMethods)(nil), // 56: yorkie.v1.UpdatableProjectFields.AuthWebhookMethods
-	nil,                            // 57: yorkie.v1.Presence.DataEntry
-	(*timestamppb.Timestamp)(nil),  // 58: google.protobuf.Timestamp
-	(*wrapperspb.StringValue)(nil), // 59: google.protobuf.StringValue
+	(*Operation_ArraySet)(nil),     // 41: yorkie.v1.Operation.ArraySet
+	nil,                            // 42: yorkie.v1.Operation.Edit.CreatedAtMapByActorEntry
+	nil,                            // 43: yorkie.v1.Operation.Edit.AttributesEntry
+	nil,                            // 44: yorkie.v1.Operation.Style.AttributesEntry
+	nil,                            // 45: yorkie.v1.Operation.Style.CreatedAtMapByActorEntry
+	nil,                            // 46: yorkie.v1.Operation.TreeEdit.CreatedAtMapByActorEntry
+	nil,                            // 47: yorkie.v1.Operation.TreeStyle.AttributesEntry
+	nil,                            // 48: yorkie.v1.Operation.TreeStyle.CreatedAtMapByActorEntry
+	(*JSONElement_JSONObject)(nil), // 49: yorkie.v1.JSONElement.JSONObject
+	(*JSONElement_JSONArray)(nil),  // 50: yorkie.v1.JSONElement.JSONArray
+	(*JSONElement_Primitive)(nil),  // 51: yorkie.v1.JSONElement.Primitive
+	(*JSONElement_Text)(nil),       // 52: yorkie.v1.JSONElement.Text
+	(*JSONElement_Counter)(nil),    // 53: yorkie.v1.JSONElement.Counter
+	(*JSONElement_Tree)(nil),       // 54: yorkie.v1.JSONElement.Tree
+	nil,                            // 55: yorkie.v1.TextNode.AttributesEntry
+	nil,                            // 56: yorkie.v1.TreeNode.AttributesEntry
+	(*UpdatableProjectFields_AuthWebhookMethods)(nil), // 57: yorkie.v1.UpdatableProjectFields.AuthWebhookMethods
+	nil,                            // 58: yorkie.v1.Presence.DataEntry
+	(*timestamppb.Timestamp)(nil),  // 59: google.protobuf.Timestamp
+	(*wrapperspb.StringValue)(nil), // 60: google.protobuf.StringValue
 }
 var file_yorkie_v1_resources_proto_depIdxs = []int32{
 	9,   // 0: yorkie.v1.Snapshot.root:type_name -> yorkie.v1.JSONElement
@@ -4285,131 +4390,136 @@ var file_yorkie_v1_resources_proto_depIdxs = []int32{
 	38,  // 15: yorkie.v1.Operation.increase:type_name -> yorkie.v1.Operation.Increase
 	39,  // 16: yorkie.v1.Operation.tree_edit:type_name -> yorkie.v1.Operation.TreeEdit
 	40,  // 17: yorkie.v1.Operation.tree_style:type_name -> yorkie.v1.Operation.TreeStyle
-	27,  // 18: yorkie.v1.JSONElementSimple.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 19: yorkie.v1.JSONElementSimple.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 20: yorkie.v1.JSONElementSimple.removed_at:type_name -> yorkie.v1.TimeTicket
-	0,   // 21: yorkie.v1.JSONElementSimple.type:type_name -> yorkie.v1.ValueType
-	48,  // 22: yorkie.v1.JSONElement.json_object:type_name -> yorkie.v1.JSONElement.JSONObject
-	49,  // 23: yorkie.v1.JSONElement.json_array:type_name -> yorkie.v1.JSONElement.JSONArray
-	50,  // 24: yorkie.v1.JSONElement.primitive:type_name -> yorkie.v1.JSONElement.Primitive
-	51,  // 25: yorkie.v1.JSONElement.text:type_name -> yorkie.v1.JSONElement.Text
-	52,  // 26: yorkie.v1.JSONElement.counter:type_name -> yorkie.v1.JSONElement.Counter
-	53,  // 27: yorkie.v1.JSONElement.tree:type_name -> yorkie.v1.JSONElement.Tree
-	9,   // 28: yorkie.v1.RHTNode.element:type_name -> yorkie.v1.JSONElement
-	11,  // 29: yorkie.v1.RGANode.next:type_name -> yorkie.v1.RGANode
-	9,   // 30: yorkie.v1.RGANode.element:type_name -> yorkie.v1.JSONElement
-	27,  // 31: yorkie.v1.NodeAttr.updated_at:type_name -> yorkie.v1.TimeTicket
-	14,  // 32: yorkie.v1.TextNode.id:type_name -> yorkie.v1.TextNodeID
-	27,  // 33: yorkie.v1.TextNode.removed_at:type_name -> yorkie.v1.TimeTicket
-	14,  // 34: yorkie.v1.TextNode.ins_prev_id:type_name -> yorkie.v1.TextNodeID
-	54,  // 35: yorkie.v1.TextNode.attributes:type_name -> yorkie.v1.TextNode.AttributesEntry
-	27,  // 36: yorkie.v1.TextNodeID.created_at:type_name -> yorkie.v1.TimeTicket
-	17,  // 37: yorkie.v1.TreeNode.id:type_name -> yorkie.v1.TreeNodeID
-	27,  // 38: yorkie.v1.TreeNode.removed_at:type_name -> yorkie.v1.TimeTicket
-	17,  // 39: yorkie.v1.TreeNode.ins_prev_id:type_name -> yorkie.v1.TreeNodeID
-	17,  // 40: yorkie.v1.TreeNode.ins_next_id:type_name -> yorkie.v1.TreeNodeID
-	55,  // 41: yorkie.v1.TreeNode.attributes:type_name -> yorkie.v1.TreeNode.AttributesEntry
-	15,  // 42: yorkie.v1.TreeNodes.content:type_name -> yorkie.v1.TreeNode
-	27,  // 43: yorkie.v1.TreeNodeID.created_at:type_name -> yorkie.v1.TimeTicket
-	17,  // 44: yorkie.v1.TreePos.parent_id:type_name -> yorkie.v1.TreeNodeID
-	17,  // 45: yorkie.v1.TreePos.left_sibling_id:type_name -> yorkie.v1.TreeNodeID
-	58,  // 46: yorkie.v1.User.created_at:type_name -> google.protobuf.Timestamp
-	58,  // 47: yorkie.v1.Project.created_at:type_name -> google.protobuf.Timestamp
-	58,  // 48: yorkie.v1.Project.updated_at:type_name -> google.protobuf.Timestamp
-	59,  // 49: yorkie.v1.UpdatableProjectFields.name:type_name -> google.protobuf.StringValue
-	59,  // 50: yorkie.v1.UpdatableProjectFields.auth_webhook_url:type_name -> google.protobuf.StringValue
-	56,  // 51: yorkie.v1.UpdatableProjectFields.auth_webhook_methods:type_name -> yorkie.v1.UpdatableProjectFields.AuthWebhookMethods
-	59,  // 52: yorkie.v1.UpdatableProjectFields.client_deactivate_threshold:type_name -> google.protobuf.StringValue
-	58,  // 53: yorkie.v1.DocumentSummary.created_at:type_name -> google.protobuf.Timestamp
-	58,  // 54: yorkie.v1.DocumentSummary.accessed_at:type_name -> google.protobuf.Timestamp
-	58,  // 55: yorkie.v1.DocumentSummary.updated_at:type_name -> google.protobuf.Timestamp
-	2,   // 56: yorkie.v1.PresenceChange.type:type_name -> yorkie.v1.PresenceChange.ChangeType
-	24,  // 57: yorkie.v1.PresenceChange.presence:type_name -> yorkie.v1.Presence
-	57,  // 58: yorkie.v1.Presence.data:type_name -> yorkie.v1.Presence.DataEntry
-	27,  // 59: yorkie.v1.TextNodePos.created_at:type_name -> yorkie.v1.TimeTicket
-	1,   // 60: yorkie.v1.DocEvent.type:type_name -> yorkie.v1.DocEventType
-	28,  // 61: yorkie.v1.DocEvent.body:type_name -> yorkie.v1.DocEventBody
-	24,  // 62: yorkie.v1.Snapshot.PresencesEntry.value:type_name -> yorkie.v1.Presence
-	27,  // 63: yorkie.v1.Operation.Set.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	8,   // 64: yorkie.v1.Operation.Set.value:type_name -> yorkie.v1.JSONElementSimple
-	27,  // 65: yorkie.v1.Operation.Set.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 66: yorkie.v1.Operation.Add.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 67: yorkie.v1.Operation.Add.prev_created_at:type_name -> yorkie.v1.TimeTicket
-	8,   // 68: yorkie.v1.Operation.Add.value:type_name -> yorkie.v1.JSONElementSimple
-	27,  // 69: yorkie.v1.Operation.Add.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 70: yorkie.v1.Operation.Move.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 71: yorkie.v1.Operation.Move.prev_created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 72: yorkie.v1.Operation.Move.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 73: yorkie.v1.Operation.Move.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 74: yorkie.v1.Operation.Remove.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 75: yorkie.v1.Operation.Remove.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 76: yorkie.v1.Operation.Remove.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 77: yorkie.v1.Operation.Edit.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	26,  // 78: yorkie.v1.Operation.Edit.from:type_name -> yorkie.v1.TextNodePos
-	26,  // 79: yorkie.v1.Operation.Edit.to:type_name -> yorkie.v1.TextNodePos
-	41,  // 80: yorkie.v1.Operation.Edit.created_at_map_by_actor:type_name -> yorkie.v1.Operation.Edit.CreatedAtMapByActorEntry
-	27,  // 81: yorkie.v1.Operation.Edit.executed_at:type_name -> yorkie.v1.TimeTicket
-	42,  // 82: yorkie.v1.Operation.Edit.attributes:type_name -> yorkie.v1.Operation.Edit.AttributesEntry
-	27,  // 83: yorkie.v1.Operation.Select.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	26,  // 84: yorkie.v1.Operation.Select.from:type_name -> yorkie.v1.TextNodePos
-	26,  // 85: yorkie.v1.Operation.Select.to:type_name -> yorkie.v1.TextNodePos
-	27,  // 86: yorkie.v1.Operation.Select.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 87: yorkie.v1.Operation.Style.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	26,  // 88: yorkie.v1.Operation.Style.from:type_name -> yorkie.v1.TextNodePos
-	26,  // 89: yorkie.v1.Operation.Style.to:type_name -> yorkie.v1.TextNodePos
-	43,  // 90: yorkie.v1.Operation.Style.attributes:type_name -> yorkie.v1.Operation.Style.AttributesEntry
-	27,  // 91: yorkie.v1.Operation.Style.executed_at:type_name -> yorkie.v1.TimeTicket
-	44,  // 92: yorkie.v1.Operation.Style.created_at_map_by_actor:type_name -> yorkie.v1.Operation.Style.CreatedAtMapByActorEntry
-	27,  // 93: yorkie.v1.Operation.Increase.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	8,   // 94: yorkie.v1.Operation.Increase.value:type_name -> yorkie.v1.JSONElementSimple
-	27,  // 95: yorkie.v1.Operation.Increase.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 96: yorkie.v1.Operation.TreeEdit.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	18,  // 97: yorkie.v1.Operation.TreeEdit.from:type_name -> yorkie.v1.TreePos
-	18,  // 98: yorkie.v1.Operation.TreeEdit.to:type_name -> yorkie.v1.TreePos
-	45,  // 99: yorkie.v1.Operation.TreeEdit.created_at_map_by_actor:type_name -> yorkie.v1.Operation.TreeEdit.CreatedAtMapByActorEntry
-	16,  // 100: yorkie.v1.Operation.TreeEdit.contents:type_name -> yorkie.v1.TreeNodes
-	27,  // 101: yorkie.v1.Operation.TreeEdit.executed_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 102: yorkie.v1.Operation.TreeStyle.parent_created_at:type_name -> yorkie.v1.TimeTicket
-	18,  // 103: yorkie.v1.Operation.TreeStyle.from:type_name -> yorkie.v1.TreePos
-	18,  // 104: yorkie.v1.Operation.TreeStyle.to:type_name -> yorkie.v1.TreePos
-	46,  // 105: yorkie.v1.Operation.TreeStyle.attributes:type_name -> yorkie.v1.Operation.TreeStyle.AttributesEntry
-	27,  // 106: yorkie.v1.Operation.TreeStyle.executed_at:type_name -> yorkie.v1.TimeTicket
-	47,  // 107: yorkie.v1.Operation.TreeStyle.created_at_map_by_actor:type_name -> yorkie.v1.Operation.TreeStyle.CreatedAtMapByActorEntry
-	27,  // 108: yorkie.v1.Operation.Edit.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
-	27,  // 109: yorkie.v1.Operation.Style.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
-	27,  // 110: yorkie.v1.Operation.TreeEdit.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
-	27,  // 111: yorkie.v1.Operation.TreeStyle.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
-	10,  // 112: yorkie.v1.JSONElement.JSONObject.nodes:type_name -> yorkie.v1.RHTNode
-	27,  // 113: yorkie.v1.JSONElement.JSONObject.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 114: yorkie.v1.JSONElement.JSONObject.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 115: yorkie.v1.JSONElement.JSONObject.removed_at:type_name -> yorkie.v1.TimeTicket
-	11,  // 116: yorkie.v1.JSONElement.JSONArray.nodes:type_name -> yorkie.v1.RGANode
-	27,  // 117: yorkie.v1.JSONElement.JSONArray.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 118: yorkie.v1.JSONElement.JSONArray.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 119: yorkie.v1.JSONElement.JSONArray.removed_at:type_name -> yorkie.v1.TimeTicket
-	0,   // 120: yorkie.v1.JSONElement.Primitive.type:type_name -> yorkie.v1.ValueType
-	27,  // 121: yorkie.v1.JSONElement.Primitive.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 122: yorkie.v1.JSONElement.Primitive.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 123: yorkie.v1.JSONElement.Primitive.removed_at:type_name -> yorkie.v1.TimeTicket
-	13,  // 124: yorkie.v1.JSONElement.Text.nodes:type_name -> yorkie.v1.TextNode
-	27,  // 125: yorkie.v1.JSONElement.Text.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 126: yorkie.v1.JSONElement.Text.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 127: yorkie.v1.JSONElement.Text.removed_at:type_name -> yorkie.v1.TimeTicket
-	0,   // 128: yorkie.v1.JSONElement.Counter.type:type_name -> yorkie.v1.ValueType
-	27,  // 129: yorkie.v1.JSONElement.Counter.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 130: yorkie.v1.JSONElement.Counter.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 131: yorkie.v1.JSONElement.Counter.removed_at:type_name -> yorkie.v1.TimeTicket
-	15,  // 132: yorkie.v1.JSONElement.Tree.nodes:type_name -> yorkie.v1.TreeNode
-	27,  // 133: yorkie.v1.JSONElement.Tree.created_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 134: yorkie.v1.JSONElement.Tree.moved_at:type_name -> yorkie.v1.TimeTicket
-	27,  // 135: yorkie.v1.JSONElement.Tree.removed_at:type_name -> yorkie.v1.TimeTicket
-	12,  // 136: yorkie.v1.TextNode.AttributesEntry.value:type_name -> yorkie.v1.NodeAttr
-	12,  // 137: yorkie.v1.TreeNode.AttributesEntry.value:type_name -> yorkie.v1.NodeAttr
-	138, // [138:138] is the sub-list for method output_type
-	138, // [138:138] is the sub-list for method input_type
-	138, // [138:138] is the sub-list for extension type_name
-	138, // [138:138] is the sub-list for extension extendee
-	0,   // [0:138] is the sub-list for field type_name
+	41,  // 18: yorkie.v1.Operation.array_set:type_name -> yorkie.v1.Operation.ArraySet
+	27,  // 19: yorkie.v1.JSONElementSimple.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 20: yorkie.v1.JSONElementSimple.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 21: yorkie.v1.JSONElementSimple.removed_at:type_name -> yorkie.v1.TimeTicket
+	0,   // 22: yorkie.v1.JSONElementSimple.type:type_name -> yorkie.v1.ValueType
+	49,  // 23: yorkie.v1.JSONElement.json_object:type_name -> yorkie.v1.JSONElement.JSONObject
+	50,  // 24: yorkie.v1.JSONElement.json_array:type_name -> yorkie.v1.JSONElement.JSONArray
+	51,  // 25: yorkie.v1.JSONElement.primitive:type_name -> yorkie.v1.JSONElement.Primitive
+	52,  // 26: yorkie.v1.JSONElement.text:type_name -> yorkie.v1.JSONElement.Text
+	53,  // 27: yorkie.v1.JSONElement.counter:type_name -> yorkie.v1.JSONElement.Counter
+	54,  // 28: yorkie.v1.JSONElement.tree:type_name -> yorkie.v1.JSONElement.Tree
+	9,   // 29: yorkie.v1.RHTNode.element:type_name -> yorkie.v1.JSONElement
+	11,  // 30: yorkie.v1.RGANode.next:type_name -> yorkie.v1.RGANode
+	9,   // 31: yorkie.v1.RGANode.element:type_name -> yorkie.v1.JSONElement
+	27,  // 32: yorkie.v1.NodeAttr.updated_at:type_name -> yorkie.v1.TimeTicket
+	14,  // 33: yorkie.v1.TextNode.id:type_name -> yorkie.v1.TextNodeID
+	27,  // 34: yorkie.v1.TextNode.removed_at:type_name -> yorkie.v1.TimeTicket
+	14,  // 35: yorkie.v1.TextNode.ins_prev_id:type_name -> yorkie.v1.TextNodeID
+	55,  // 36: yorkie.v1.TextNode.attributes:type_name -> yorkie.v1.TextNode.AttributesEntry
+	27,  // 37: yorkie.v1.TextNodeID.created_at:type_name -> yorkie.v1.TimeTicket
+	17,  // 38: yorkie.v1.TreeNode.id:type_name -> yorkie.v1.TreeNodeID
+	27,  // 39: yorkie.v1.TreeNode.removed_at:type_name -> yorkie.v1.TimeTicket
+	17,  // 40: yorkie.v1.TreeNode.ins_prev_id:type_name -> yorkie.v1.TreeNodeID
+	17,  // 41: yorkie.v1.TreeNode.ins_next_id:type_name -> yorkie.v1.TreeNodeID
+	56,  // 42: yorkie.v1.TreeNode.attributes:type_name -> yorkie.v1.TreeNode.AttributesEntry
+	15,  // 43: yorkie.v1.TreeNodes.content:type_name -> yorkie.v1.TreeNode
+	27,  // 44: yorkie.v1.TreeNodeID.created_at:type_name -> yorkie.v1.TimeTicket
+	17,  // 45: yorkie.v1.TreePos.parent_id:type_name -> yorkie.v1.TreeNodeID
+	17,  // 46: yorkie.v1.TreePos.left_sibling_id:type_name -> yorkie.v1.TreeNodeID
+	59,  // 47: yorkie.v1.User.created_at:type_name -> google.protobuf.Timestamp
+	59,  // 48: yorkie.v1.Project.created_at:type_name -> google.protobuf.Timestamp
+	59,  // 49: yorkie.v1.Project.updated_at:type_name -> google.protobuf.Timestamp
+	60,  // 50: yorkie.v1.UpdatableProjectFields.name:type_name -> google.protobuf.StringValue
+	60,  // 51: yorkie.v1.UpdatableProjectFields.auth_webhook_url:type_name -> google.protobuf.StringValue
+	57,  // 52: yorkie.v1.UpdatableProjectFields.auth_webhook_methods:type_name -> yorkie.v1.UpdatableProjectFields.AuthWebhookMethods
+	60,  // 53: yorkie.v1.UpdatableProjectFields.client_deactivate_threshold:type_name -> google.protobuf.StringValue
+	59,  // 54: yorkie.v1.DocumentSummary.created_at:type_name -> google.protobuf.Timestamp
+	59,  // 55: yorkie.v1.DocumentSummary.accessed_at:type_name -> google.protobuf.Timestamp
+	59,  // 56: yorkie.v1.DocumentSummary.updated_at:type_name -> google.protobuf.Timestamp
+	2,   // 57: yorkie.v1.PresenceChange.type:type_name -> yorkie.v1.PresenceChange.ChangeType
+	24,  // 58: yorkie.v1.PresenceChange.presence:type_name -> yorkie.v1.Presence
+	58,  // 59: yorkie.v1.Presence.data:type_name -> yorkie.v1.Presence.DataEntry
+	27,  // 60: yorkie.v1.TextNodePos.created_at:type_name -> yorkie.v1.TimeTicket
+	1,   // 61: yorkie.v1.DocEvent.type:type_name -> yorkie.v1.DocEventType
+	28,  // 62: yorkie.v1.DocEvent.body:type_name -> yorkie.v1.DocEventBody
+	24,  // 63: yorkie.v1.Snapshot.PresencesEntry.value:type_name -> yorkie.v1.Presence
+	27,  // 64: yorkie.v1.Operation.Set.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	8,   // 65: yorkie.v1.Operation.Set.value:type_name -> yorkie.v1.JSONElementSimple
+	27,  // 66: yorkie.v1.Operation.Set.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 67: yorkie.v1.Operation.Add.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 68: yorkie.v1.Operation.Add.prev_created_at:type_name -> yorkie.v1.TimeTicket
+	8,   // 69: yorkie.v1.Operation.Add.value:type_name -> yorkie.v1.JSONElementSimple
+	27,  // 70: yorkie.v1.Operation.Add.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 71: yorkie.v1.Operation.Move.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 72: yorkie.v1.Operation.Move.prev_created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 73: yorkie.v1.Operation.Move.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 74: yorkie.v1.Operation.Move.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 75: yorkie.v1.Operation.Remove.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 76: yorkie.v1.Operation.Remove.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 77: yorkie.v1.Operation.Remove.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 78: yorkie.v1.Operation.Edit.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	26,  // 79: yorkie.v1.Operation.Edit.from:type_name -> yorkie.v1.TextNodePos
+	26,  // 80: yorkie.v1.Operation.Edit.to:type_name -> yorkie.v1.TextNodePos
+	42,  // 81: yorkie.v1.Operation.Edit.created_at_map_by_actor:type_name -> yorkie.v1.Operation.Edit.CreatedAtMapByActorEntry
+	27,  // 82: yorkie.v1.Operation.Edit.executed_at:type_name -> yorkie.v1.TimeTicket
+	43,  // 83: yorkie.v1.Operation.Edit.attributes:type_name -> yorkie.v1.Operation.Edit.AttributesEntry
+	27,  // 84: yorkie.v1.Operation.Select.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	26,  // 85: yorkie.v1.Operation.Select.from:type_name -> yorkie.v1.TextNodePos
+	26,  // 86: yorkie.v1.Operation.Select.to:type_name -> yorkie.v1.TextNodePos
+	27,  // 87: yorkie.v1.Operation.Select.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 88: yorkie.v1.Operation.Style.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	26,  // 89: yorkie.v1.Operation.Style.from:type_name -> yorkie.v1.TextNodePos
+	26,  // 90: yorkie.v1.Operation.Style.to:type_name -> yorkie.v1.TextNodePos
+	44,  // 91: yorkie.v1.Operation.Style.attributes:type_name -> yorkie.v1.Operation.Style.AttributesEntry
+	27,  // 92: yorkie.v1.Operation.Style.executed_at:type_name -> yorkie.v1.TimeTicket
+	45,  // 93: yorkie.v1.Operation.Style.created_at_map_by_actor:type_name -> yorkie.v1.Operation.Style.CreatedAtMapByActorEntry
+	27,  // 94: yorkie.v1.Operation.Increase.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	8,   // 95: yorkie.v1.Operation.Increase.value:type_name -> yorkie.v1.JSONElementSimple
+	27,  // 96: yorkie.v1.Operation.Increase.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 97: yorkie.v1.Operation.TreeEdit.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	18,  // 98: yorkie.v1.Operation.TreeEdit.from:type_name -> yorkie.v1.TreePos
+	18,  // 99: yorkie.v1.Operation.TreeEdit.to:type_name -> yorkie.v1.TreePos
+	46,  // 100: yorkie.v1.Operation.TreeEdit.created_at_map_by_actor:type_name -> yorkie.v1.Operation.TreeEdit.CreatedAtMapByActorEntry
+	16,  // 101: yorkie.v1.Operation.TreeEdit.contents:type_name -> yorkie.v1.TreeNodes
+	27,  // 102: yorkie.v1.Operation.TreeEdit.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 103: yorkie.v1.Operation.TreeStyle.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	18,  // 104: yorkie.v1.Operation.TreeStyle.from:type_name -> yorkie.v1.TreePos
+	18,  // 105: yorkie.v1.Operation.TreeStyle.to:type_name -> yorkie.v1.TreePos
+	47,  // 106: yorkie.v1.Operation.TreeStyle.attributes:type_name -> yorkie.v1.Operation.TreeStyle.AttributesEntry
+	27,  // 107: yorkie.v1.Operation.TreeStyle.executed_at:type_name -> yorkie.v1.TimeTicket
+	48,  // 108: yorkie.v1.Operation.TreeStyle.created_at_map_by_actor:type_name -> yorkie.v1.Operation.TreeStyle.CreatedAtMapByActorEntry
+	27,  // 109: yorkie.v1.Operation.ArraySet.parent_created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 110: yorkie.v1.Operation.ArraySet.created_at:type_name -> yorkie.v1.TimeTicket
+	8,   // 111: yorkie.v1.Operation.ArraySet.value:type_name -> yorkie.v1.JSONElementSimple
+	27,  // 112: yorkie.v1.Operation.ArraySet.executed_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 113: yorkie.v1.Operation.Edit.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
+	27,  // 114: yorkie.v1.Operation.Style.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
+	27,  // 115: yorkie.v1.Operation.TreeEdit.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
+	27,  // 116: yorkie.v1.Operation.TreeStyle.CreatedAtMapByActorEntry.value:type_name -> yorkie.v1.TimeTicket
+	10,  // 117: yorkie.v1.JSONElement.JSONObject.nodes:type_name -> yorkie.v1.RHTNode
+	27,  // 118: yorkie.v1.JSONElement.JSONObject.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 119: yorkie.v1.JSONElement.JSONObject.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 120: yorkie.v1.JSONElement.JSONObject.removed_at:type_name -> yorkie.v1.TimeTicket
+	11,  // 121: yorkie.v1.JSONElement.JSONArray.nodes:type_name -> yorkie.v1.RGANode
+	27,  // 122: yorkie.v1.JSONElement.JSONArray.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 123: yorkie.v1.JSONElement.JSONArray.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 124: yorkie.v1.JSONElement.JSONArray.removed_at:type_name -> yorkie.v1.TimeTicket
+	0,   // 125: yorkie.v1.JSONElement.Primitive.type:type_name -> yorkie.v1.ValueType
+	27,  // 126: yorkie.v1.JSONElement.Primitive.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 127: yorkie.v1.JSONElement.Primitive.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 128: yorkie.v1.JSONElement.Primitive.removed_at:type_name -> yorkie.v1.TimeTicket
+	13,  // 129: yorkie.v1.JSONElement.Text.nodes:type_name -> yorkie.v1.TextNode
+	27,  // 130: yorkie.v1.JSONElement.Text.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 131: yorkie.v1.JSONElement.Text.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 132: yorkie.v1.JSONElement.Text.removed_at:type_name -> yorkie.v1.TimeTicket
+	0,   // 133: yorkie.v1.JSONElement.Counter.type:type_name -> yorkie.v1.ValueType
+	27,  // 134: yorkie.v1.JSONElement.Counter.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 135: yorkie.v1.JSONElement.Counter.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 136: yorkie.v1.JSONElement.Counter.removed_at:type_name -> yorkie.v1.TimeTicket
+	15,  // 137: yorkie.v1.JSONElement.Tree.nodes:type_name -> yorkie.v1.TreeNode
+	27,  // 138: yorkie.v1.JSONElement.Tree.created_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 139: yorkie.v1.JSONElement.Tree.moved_at:type_name -> yorkie.v1.TimeTicket
+	27,  // 140: yorkie.v1.JSONElement.Tree.removed_at:type_name -> yorkie.v1.TimeTicket
+	12,  // 141: yorkie.v1.TextNode.AttributesEntry.value:type_name -> yorkie.v1.NodeAttr
+	12,  // 142: yorkie.v1.TreeNode.AttributesEntry.value:type_name -> yorkie.v1.NodeAttr
+	143, // [143:143] is the sub-list for method output_type
+	143, // [143:143] is the sub-list for method input_type
+	143, // [143:143] is the sub-list for extension type_name
+	143, // [143:143] is the sub-list for extension extendee
+	0,   // [0:143] is the sub-list for field type_name
 }
 
 func init() { file_yorkie_v1_resources_proto_init() }
@@ -4862,8 +4972,8 @@ func file_yorkie_v1_resources_proto_init() {
 				return nil
 			}
 		}
-		file_yorkie_v1_resources_proto_msgTypes[45].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*JSONElement_JSONObject); i {
+		file_yorkie_v1_resources_proto_msgTypes[38].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Operation_ArraySet); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4875,7 +4985,7 @@ func file_yorkie_v1_resources_proto_init() {
 			}
 		}
 		file_yorkie_v1_resources_proto_msgTypes[46].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*JSONElement_JSONArray); i {
+			switch v := v.(*JSONElement_JSONObject); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4887,7 +4997,7 @@ func file_yorkie_v1_resources_proto_init() {
 			}
 		}
 		file_yorkie_v1_resources_proto_msgTypes[47].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*JSONElement_Primitive); i {
+			switch v := v.(*JSONElement_JSONArray); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4899,7 +5009,7 @@ func file_yorkie_v1_resources_proto_init() {
 			}
 		}
 		file_yorkie_v1_resources_proto_msgTypes[48].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*JSONElement_Text); i {
+			switch v := v.(*JSONElement_Primitive); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4911,7 +5021,7 @@ func file_yorkie_v1_resources_proto_init() {
 			}
 		}
 		file_yorkie_v1_resources_proto_msgTypes[49].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*JSONElement_Counter); i {
+			switch v := v.(*JSONElement_Text); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -4923,6 +5033,18 @@ func file_yorkie_v1_resources_proto_init() {
 			}
 		}
 		file_yorkie_v1_resources_proto_msgTypes[50].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*JSONElement_Counter); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_yorkie_v1_resources_proto_msgTypes[51].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*JSONElement_Tree); i {
 			case 0:
 				return &v.state
@@ -4934,7 +5056,7 @@ func file_yorkie_v1_resources_proto_init() {
 				return nil
 			}
 		}
-		file_yorkie_v1_resources_proto_msgTypes[53].Exporter = func(v interface{}, i int) interface{} {
+		file_yorkie_v1_resources_proto_msgTypes[54].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*UpdatableProjectFields_AuthWebhookMethods); i {
 			case 0:
 				return &v.state
@@ -4958,6 +5080,7 @@ func file_yorkie_v1_resources_proto_init() {
 		(*Operation_Increase_)(nil),
 		(*Operation_TreeEdit_)(nil),
 		(*Operation_TreeStyle_)(nil),
+		(*Operation_ArraySet_)(nil),
 	}
 	file_yorkie_v1_resources_proto_msgTypes[6].OneofWrappers = []interface{}{
 		(*JSONElement_JsonObject)(nil),
@@ -4973,7 +5096,7 @@ func file_yorkie_v1_resources_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_yorkie_v1_resources_proto_rawDesc,
 			NumEnums:      3,
-			NumMessages:   55,
+			NumMessages:   56,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/api/yorkie/v1/resources.proto b/api/yorkie/v1/resources.proto
index d1a8c3776..825cd8622 100644
--- a/api/yorkie/v1/resources.proto
+++ b/api/yorkie/v1/resources.proto
@@ -136,6 +136,12 @@ message Operation {
     repeated string attributes_to_remove = 6;
     map<string, TimeTicket> created_at_map_by_actor = 7;
   }
+  message ArraySet {
+    TimeTicket parent_created_at = 1;
+    TimeTicket created_at = 2;
+    JSONElementSimple value = 3;
+    TimeTicket executed_at = 4;
+  }
 
   oneof body {
     Set set = 1;
@@ -148,6 +154,7 @@ message Operation {
     Increase increase = 8;
     TreeEdit tree_edit = 9;
     TreeStyle tree_style = 10;
+    ArraySet array_set = 11;
   }
 }
 
diff --git a/build/docker/README.md b/build/docker/README.md
index ef18072f2..28820835c 100644
--- a/build/docker/README.md
+++ b/build/docker/README.md
@@ -18,5 +18,5 @@ docker compose -f docker/docker-compose.yml down
 The docker-compose files we use are as follows:
 - `docker-compose.yml`: This file is used to run Yorkie's integration tests. It
  runs MongoDB.
-- `docker-compose-full.yml`: This file launches all the applications needed to
- develop Yorkie. It also runs monitoring tools such as Prometheus and Grafana.
+- `docker-compose-full.yml`: This file builds Yorkie and launches it. It also runs
+ MongoDB and monitoring tools such as Prometheus and Grafana.
diff --git a/build/docker/docker-compose-full.yml b/build/docker/docker-compose-full.yml
index c6739062d..b49563f24 100644
--- a/build/docker/docker-compose-full.yml
+++ b/build/docker/docker-compose-full.yml
@@ -5,16 +5,21 @@ services:
     image: prom/prometheus:latest
     container_name: prometheus
     ports:
-    - '9090:9090'
+      - '9090:9090'
     command:
-    - --config.file=/etc/prometheus/prometheus.yml
+      - --config.file=/etc/prometheus/prometheus.yml
     volumes:
-    - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - ./monitoring/prometheus.yml:/etc/prometheus/prometheus.yml:ro
   grafana:
     image: grafana/grafana:latest
     container_name: grafana
     ports:
       - '3000:3000'
+    command:
+      - --config=/etc/grafana/grafana.ini
+    volumes:
+      - ./monitoring/grafana.ini:/etc/grafana/grafana.ini:ro
+      - ./monitoring/datasources.yml:/etc/grafana/provisioning/datasources/datasources.yml:ro
     depends_on:
       - prometheus
   mongo:
@@ -23,3 +28,21 @@ services:
     restart: always
     ports:
       - '27017:27017'
+  yorkie:
+    build:
+      context: ../../
+      dockerfile: Dockerfile
+    container_name: 'yorkie'
+    command:
+      [
+        'server',
+        '--mongo-connection-uri',
+        'mongodb://mongo:27017',
+        '--enable-pprof',
+      ]
+    restart: always
+    ports:
+      - '8080:8080'
+      - '8081:8081'
+    depends_on:
+      - mongo
diff --git a/build/docker/monitoring/README.md b/build/docker/monitoring/README.md
new file mode 100644
index 000000000..d49d5c0a4
--- /dev/null
+++ b/build/docker/monitoring/README.md
@@ -0,0 +1,12 @@
+# Grafana Setup Guide
+
+## Importing Dashboards
+
+To import dashboards into Grafana, follow these steps:
+
+1. Open Grafana in your browser ([http://localhost:3000](http://localhost:3000)).
+2. Log in with the default credentials (admin/admin).
+3. Click "Dashboards" in the left sidebar.
+4. Click "New" and then "Import".
+5. Use the Yorkie dashboard ID `18560` to import the dashboard.
+6. Click "Load" and "Import" and the dashboard will be made.
diff --git a/build/docker/monitoring/datasources.yml b/build/docker/monitoring/datasources.yml
new file mode 100644
index 000000000..86fd3465e
--- /dev/null
+++ b/build/docker/monitoring/datasources.yml
@@ -0,0 +1,8 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
diff --git a/build/docker/monitoring/grafana.ini b/build/docker/monitoring/grafana.ini
new file mode 100644
index 000000000..6145316b9
--- /dev/null
+++ b/build/docker/monitoring/grafana.ini
@@ -0,0 +1,21 @@
+[paths]
+provisioning = /etc/grafana/provisioning
+
+[server]
+http_port = 3000
+
+[security]
+admin_user = admin
+admin_password = admin
+
+[users]
+allow_sign_up = true
+
+[auth.anonymous]
+enabled = false
+
+[dashboards]
+versions_to_keep = 20
+
+[unified_alerting]
+enabled = true
diff --git a/build/docker/monitoring/prometheus.yml b/build/docker/monitoring/prometheus.yml
new file mode 100644
index 000000000..9cd0205d6
--- /dev/null
+++ b/build/docker/monitoring/prometheus.yml
@@ -0,0 +1,7 @@
+scrape_configs:
+- job_name: yorkie
+  metrics_path: /metrics
+  scrape_interval: 5s
+  static_configs:
+  - targets:
+    - yorkie:8081
diff --git a/build/docker/prometheus.yml b/build/docker/prometheus.yml
deleted file mode 100644
index 8f9792960..000000000
--- a/build/docker/prometheus.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-scrape_configs:
-- job_name: yorkie
-  metrics_path: /metrics
-  scrape_interval: 5s
-  static_configs:
-  - targets:
-    # win/mac hosts: Use address: host.docker.internal instead of address: localhost in the line below
-    - host.docker.internal:8081
diff --git a/client/client.go b/client/client.go
index 7edc20dba..3f2f082b0 100644
--- a/client/client.go
+++ b/client/client.go
@@ -792,11 +792,11 @@ func (c *Client) broadcast(ctx context.Context, doc *document.Document, topic st
 func newTLSConfigFromFile(certFile, serverNameOverride string) (*tls.Config, error) {
 	b, err := os.ReadFile(filepath.Clean(certFile))
 	if err != nil {
-		return nil, fmt.Errorf("credentials: failed to read TLS config file %q: %w", certFile, err)
+		return nil, fmt.Errorf("read TLS config file %q: %w", certFile, err)
 	}
 	cp := x509.NewCertPool()
 	if !cp.AppendCertsFromPEM(b) {
-		return nil, fmt.Errorf("credentials: failed to append certificates")
+		return nil, fmt.Errorf("failure to append certs from PEM")
 	}
 
 	return &tls.Config{ServerName: serverNameOverride, RootCAs: cp, MinVersion: tls.VersionTLS12}, nil
diff --git a/cmd/yorkie/config/config.go b/cmd/yorkie/config/config.go
index f60cee070..687763fa9 100644
--- a/cmd/yorkie/config/config.go
+++ b/cmd/yorkie/config/config.go
@@ -170,7 +170,7 @@ func Preload(_ *cobra.Command, _ []string) error {
 	}
 
 	if err := viper.ReadInConfig(); err != nil {
-		return fmt.Errorf("failed to read in config: %w", err)
+		return fmt.Errorf("read in config: %w", err)
 	}
 	return nil
 }
diff --git a/cmd/yorkie/delete_account.go b/cmd/yorkie/delete_account.go
new file mode 100644
index 000000000..6e1f61273
--- /dev/null
+++ b/cmd/yorkie/delete_account.go
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2024 The Yorkie Authors. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/yorkie-team/yorkie/admin"
+	"github.com/yorkie-team/yorkie/cmd/yorkie/config"
+)
+
+func deleteAccountCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:     "delete-account",
+		Short:   "Delete account",
+		PreRunE: config.Preload,
+		RunE: func(_ *cobra.Command, args []string) error {
+			rpcAddr := viper.GetString("rpcAddr")
+			auth, err := config.LoadAuth(rpcAddr)
+			if err != nil {
+				return err
+			}
+
+			if err := readPassword(); err != nil {
+				return err
+			}
+
+			if confirmation, err := makeConfirmation(); !confirmation || err != nil {
+				if err != nil {
+					return err
+				}
+				return nil
+			}
+
+			conf, err := config.Load()
+			if err != nil {
+				return err
+			}
+
+			if rpcAddr == "" {
+				rpcAddr = viper.GetString("rpcAddr")
+			}
+
+			if err := deleteAccount(conf, auth, rpcAddr, username, password); err != nil {
+				fmt.Println("Failed to delete account: ", err)
+			}
+
+			return nil
+		},
+	}
+}
+
+func makeConfirmation() (bool, error) {
+	fmt.Println("Warning: This action cannot be undone. Type 'DELETE' to confirm: ")
+	var confirmation string
+	if _, err := fmt.Scanln(&confirmation); err != nil {
+		return false, fmt.Errorf("read confirmation from user: %w", err)
+	}
+
+	if confirmation != "DELETE" {
+		return false, fmt.Errorf("account deletion aborted")
+	}
+
+	return true, nil
+}
+
+func deleteAccount(conf *config.Config, auth config.Auth, rpcAddr, username, password string) error {
+	cli, err := admin.Dial(rpcAddr, admin.WithToken(auth.Token), admin.WithInsecure(auth.Insecure))
+	if err != nil {
+		return err
+	}
+	defer func() {
+		cli.Close()
+	}()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	if err := cli.DeleteAccount(ctx, username, password); err != nil {
+		return fmt.Errorf("delete account: %w", err)
+	}
+
+	delete(conf.Auths, rpcAddr)
+	if conf.RPCAddr == rpcAddr {
+		for addr := range conf.Auths {
+			conf.RPCAddr = addr
+			break
+		}
+	}
+
+	if err := config.Save(conf); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func init() {
+	cmd := deleteAccountCmd()
+	cmd.Flags().StringVarP(
+		&username,
+		"username",
+		"u",
+		"",
+		"Username",
+	)
+	cmd.Flags().StringVarP(
+		&password,
+		"password",
+		"p",
+		"",
+		"Password (optional)",
+	)
+
+	_ = cmd.MarkFlagRequired("username")
+	rootCmd.AddCommand(cmd)
+}
diff --git a/cmd/yorkie/login.go b/cmd/yorkie/login.go
index da636f0c8..d2626bd15 100644
--- a/cmd/yorkie/login.go
+++ b/cmd/yorkie/login.go
@@ -18,8 +18,11 @@ package main
 
 import (
 	"context"
+	"fmt"
+	"os"
 
 	"github.com/spf13/cobra"
+	"golang.org/x/term"
 
 	"github.com/yorkie-team/yorkie/admin"
 	"github.com/yorkie-team/yorkie/cmd/yorkie/config"
@@ -35,9 +38,13 @@ var (
 func newLoginCmd() *cobra.Command {
 	return &cobra.Command{
 		Use:     "login",
-		Short:   "Log in to Yorkie server",
+		Short:   "Log in to the Yorkie server",
 		PreRunE: config.Preload,
 		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := readPassword(); err != nil {
+				return err
+			}
+
 			cli, err := admin.Dial(rpcAddr, admin.WithInsecure(insecure))
 			if err != nil {
 				return err
@@ -74,6 +81,20 @@ func newLoginCmd() *cobra.Command {
 	}
 }
 
+// readPassword reads the password from the user.
+func readPassword() error {
+	if password == "" {
+		fmt.Print("Enter Password: ")
+		bytePassword, err := term.ReadPassword(int(os.Stdin.Fd()))
+		if err != nil {
+			return fmt.Errorf("read password: %w", err)
+		}
+		password = string(bytePassword)
+		fmt.Println()
+	}
+	return nil
+}
+
 func init() {
 	cmd := newLoginCmd()
 	cmd.Flags().StringVarP(
@@ -81,14 +102,14 @@ func init() {
 		"username",
 		"u",
 		"",
-		"Username (required if password is set)",
+		"Username",
 	)
 	cmd.Flags().StringVarP(
 		&password,
 		"password",
 		"p",
 		"",
-		"Password (required if username is set)",
+		"Password (optional)",
 	)
 	cmd.Flags().StringVar(
 		&rpcAddr,
@@ -102,6 +123,6 @@ func init() {
 		false,
 		"Skip the TLS connection of the client",
 	)
-	cmd.MarkFlagsRequiredTogether("username", "password")
+	_ = cmd.MarkFlagRequired("username")
 	rootCmd.AddCommand(cmd)
 }
diff --git a/cmd/yorkie/passwd.go b/cmd/yorkie/passwd.go
new file mode 100644
index 000000000..0c1200317
--- /dev/null
+++ b/cmd/yorkie/passwd.go
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2024 The Yorkie Authors. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"golang.org/x/term"
+
+	"github.com/yorkie-team/yorkie/admin"
+	"github.com/yorkie-team/yorkie/cmd/yorkie/config"
+)
+
+func passwdCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:     "passwd",
+		Short:   "Change password",
+		PreRunE: config.Preload,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			rpcAddr := viper.GetString("rpcAddr")
+			auth, err := config.LoadAuth(rpcAddr)
+			if err != nil {
+				return err
+			}
+
+			password, newPassword, err := readPasswords()
+			if err != nil {
+				return err
+			}
+
+			cli, err := admin.Dial(rpcAddr, admin.WithToken(auth.Token), admin.WithInsecure(auth.Insecure))
+			if err != nil {
+				return err
+			}
+			defer func() {
+				cli.Close()
+			}()
+
+			ctx := context.Background()
+			if err := cli.ChangePassword(ctx, username, password, newPassword); err != nil {
+				return err
+			}
+
+			if err := deleteAuthSession(rpcAddr); err != nil {
+				return err
+			}
+
+			return nil
+		},
+	}
+}
+
+func readPasswords() (string, string, error) {
+	fmt.Print("Enter Password: ")
+	bytePassword, err := term.ReadPassword(int(os.Stdin.Fd()))
+	if err != nil {
+		return "", "", fmt.Errorf("read password: %w", err)
+	}
+	password := string(bytePassword)
+	fmt.Println()
+
+	fmt.Print("Enter New Password: ")
+	bytePassword, err = term.ReadPassword(int(os.Stdin.Fd()))
+	if err != nil {
+		return "", "", fmt.Errorf("read new password: %w", err)
+	}
+	newPassword := string(bytePassword)
+	fmt.Println()
+
+	return password, newPassword, nil
+}
+
+func deleteAuthSession(rpcAddr string) error {
+	conf, err := config.Load()
+	if err != nil {
+		return err
+	}
+
+	delete(conf.Auths, rpcAddr)
+	if err := config.Save(conf); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func init() {
+	cmd := passwdCmd()
+	cmd.Flags().StringVarP(
+		&username,
+		"username",
+		"u",
+		"",
+		"Username",
+	)
+	_ = cmd.MarkFlagRequired("username")
+	rootCmd.AddCommand(cmd)
+}
diff --git a/cmd/yorkie/version.go b/cmd/yorkie/version.go
index 3255a25ad..7207f76db 100644
--- a/cmd/yorkie/version.go
+++ b/cmd/yorkie/version.go
@@ -131,13 +131,13 @@ func printVersionInfo(cmd *cobra.Command, output string, versionInfo *types.Vers
 	case "yaml":
 		marshalled, err := yaml.Marshal(versionInfo)
 		if err != nil {
-			return errors.New("failed to marshal YAML")
+			return errors.New("marshal YAML")
 		}
 		cmd.Println(string(marshalled))
 	case "json":
 		marshalled, err := json.MarshalIndent(versionInfo, "", "  ")
 		if err != nil {
-			return errors.New("failed to marshal JSON")
+			return errors.New("marshal JSON")
 		}
 		cmd.Println(string(marshalled))
 	default:
diff --git a/go.mod b/go.mod
index 3174eb884..ec2fce562 100644
--- a/go.mod
+++ b/go.mod
@@ -27,6 +27,7 @@ require (
 	google.golang.org/grpc v1.58.3
 	google.golang.org/protobuf v1.31.0
 	gopkg.in/yaml.v2 v2.4.0
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
@@ -72,10 +73,10 @@ require (
 	go.uber.org/multierr v1.9.0 // indirect
 	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
 	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/term v0.23.0
 	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
 replace github.com/hashicorp/go-memdb => github.com/hackerwins/go-memdb v1.3.3-0.20211225080334-513a74641622
diff --git a/go.sum b/go.sum
index daf71193d..10b9cb034 100644
--- a/go.sum
+++ b/go.sum
@@ -524,10 +524,12 @@ golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
-golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
+golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.23.0 h1:F6D4vR+EHoL9/sWAWgAR1H2DcHr4PareCbAaCo1RpuU=
+golang.org/x/term v0.23.0/go.mod h1:DgV24QBUrK6jhZXl+20l6UWznPlwAHm1Q1mGHtydmSk=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/pkg/document/crdt/array.go b/pkg/document/crdt/array.go
index 1a5dcd7a3..f0dcb07db 100644
--- a/pkg/document/crdt/array.go
+++ b/pkg/document/crdt/array.go
@@ -178,6 +178,18 @@ func (a *Array) DeleteByCreatedAt(createdAt *time.Ticket, deletedAt *time.Ticket
 	return node.elem, nil
 }
 
+// Set sets the given element at the given position of the creation time.
+func (a *Array) Set(createdAt *time.Ticket, element Element, executedAt *time.Ticket) (Element, error) {
+	node, err := a.elements.Set(createdAt, element, executedAt)
+	if err != nil {
+		return nil, err
+	}
+	if node != nil {
+		return node.elem, nil
+	}
+	return nil, nil
+}
+
 // Len returns length of this Array.
 func (a *Array) Len() int {
 	return a.elements.Len()
diff --git a/pkg/document/crdt/rga_tree_list.go b/pkg/document/crdt/rga_tree_list.go
index c2e71baac..eae582817 100644
--- a/pkg/document/crdt/rga_tree_list.go
+++ b/pkg/document/crdt/rga_tree_list.go
@@ -345,3 +345,27 @@ func (a *RGATreeList) insertAfter(
 	a.nodeMapByCreatedAt[value.CreatedAt().Key()] = newNode
 	return nil
 }
+
+// Set sets the given element at the given creation time.
+func (a *RGATreeList) Set(
+	createdAt *time.Ticket,
+	element Element,
+	executedAt *time.Ticket,
+) (*RGATreeListNode, error) {
+	node, ok := a.nodeMapByCreatedAt[createdAt.Key()]
+	if !ok {
+		return nil, fmt.Errorf("set %s: %w", createdAt.Key(), ErrChildNotFound)
+	}
+
+	var removed *RGATreeListNode
+	// TODO(junseo): Replace `MovedAt()` with `UpdatedAt()`
+	// because `movedAt` is related to convergence of positional operations (Insert, Move).
+	// In the current implementation, concurrent Set and Insert operations do not converge.
+	if node.elem.MovedAt() == nil || executedAt.After(node.elem.MovedAt()) {
+		removed = newRGATreeListNode(node.elem)
+
+		node.elem = element
+		node.elem.SetMovedAt(executedAt)
+	}
+	return removed, nil
+}
diff --git a/pkg/document/json/array.go b/pkg/document/json/array.go
index 954615ea6..8b024e706 100644
--- a/pkg/document/json/array.go
+++ b/pkg/document/json/array.go
@@ -167,10 +167,24 @@ func (p *Array) MoveBefore(nextCreatedAt, createdAt *time.Ticket) {
 	p.moveBeforeInternal(nextCreatedAt, createdAt)
 }
 
+// MoveAfterByIndex moves the given element to its new position after the given previous element.
+func (p *Array) MoveAfterByIndex(prevIndex, targetIndex int) {
+	prev := p.Get(prevIndex)
+	target := p.Get(targetIndex)
+	if prev == nil || target == nil {
+		panic("index out of bound")
+	}
+	p.moveAfterInternal(prev.CreatedAt(), target.CreatedAt())
+}
+
 // InsertIntegerAfter inserts the given integer after the given previous
 // element.
 func (p *Array) InsertIntegerAfter(index int, v int) *Array {
-	p.insertAfterInternal(p.Get(index).CreatedAt(), func(ticket *time.Ticket) crdt.Element {
+	prev := p.Get(index)
+	if prev == nil {
+		panic("index out of bound")
+	}
+	p.insertAfterInternal(prev.CreatedAt(), func(ticket *time.Ticket) crdt.Element {
 		primitive, err := crdt.NewPrimitive(v, ticket)
 		if err != nil {
 			panic(err)
@@ -183,7 +197,7 @@ func (p *Array) InsertIntegerAfter(index int, v int) *Array {
 
 // Get element of the given index.
 func (p *Array) Get(idx int) crdt.Element {
-	if p.Len() <= idx {
+	if idx < 0 || p.Len() <= idx {
 		return nil
 	}
 
@@ -197,15 +211,11 @@ func (p *Array) Get(idx int) crdt.Element {
 
 // GetObject returns Object of the given index.
 func (p *Array) GetObject(idx int) *Object {
-	if p.Len() <= idx {
+	element := p.Get(idx)
+	if element == nil {
 		return nil
 	}
 
-	element, err := p.Array.Get(idx)
-	if err != nil {
-		panic(err)
-	}
-
 	switch elem := element.(type) {
 	case *crdt.Object:
 		return NewObject(p.context, elem)
@@ -218,15 +228,11 @@ func (p *Array) GetObject(idx int) *Object {
 
 // GetArray returns Array of the given index.
 func (p *Array) GetArray(idx int) *Array {
-	if p.Len() <= idx {
+	element := p.Get(idx)
+	if element == nil {
 		return nil
 	}
 
-	element, err := p.Array.Get(idx)
-	if err != nil {
-		panic(err)
-	}
-
 	switch elem := element.(type) {
 	case *crdt.Array:
 		return NewArray(p.context, elem)
@@ -239,15 +245,11 @@ func (p *Array) GetArray(idx int) *Array {
 
 // GetText returns Text of the given index.
 func (p *Array) GetText(idx int) *Text {
-	if p.Len() <= idx {
+	element := p.Get(idx)
+	if element == nil {
 		return nil
 	}
 
-	element, err := p.Array.Get(idx)
-	if err != nil {
-		panic(err)
-	}
-
 	switch elem := element.(type) {
 	case *crdt.Text:
 		text := NewText()
@@ -261,15 +263,11 @@ func (p *Array) GetText(idx int) *Text {
 
 // GetCounter returns Counter of the given index.
 func (p *Array) GetCounter(idx int) *Counter {
-	if p.Len() <= idx {
+	element := p.Get(idx)
+	if element == nil {
 		return nil
 	}
 
-	element, err := p.Array.Get(idx)
-	if err != nil {
-		panic(err)
-	}
-
 	switch elem := element.(type) {
 	case *crdt.Counter:
 		counter := NewCounter(elem.Value(), elem.ValueType())
@@ -283,15 +281,11 @@ func (p *Array) GetCounter(idx int) *Counter {
 
 // GetTree returns Tree of the given index.
 func (p *Array) GetTree(idx int) *Tree {
-	if p.Len() <= idx {
+	element := p.Get(idx)
+	if element == nil {
 		return nil
 	}
 
-	element, err := p.Array.Get(idx)
-	if err != nil {
-		panic(err)
-	}
-
 	switch elem := element.(type) {
 	case *crdt.Tree:
 		tree := NewTree()
@@ -303,9 +297,26 @@ func (p *Array) GetTree(idx int) *Tree {
 	}
 }
 
+// SetInteger sets element of the given index.
+func (p *Array) SetInteger(idx int, value int) *Array {
+	target := p.Get(idx)
+	if target == nil {
+		panic("index out of bound")
+	}
+
+	p.setByIndexInternal(target.CreatedAt(), func(ticket *time.Ticket) crdt.Element {
+		primitive, err := crdt.NewPrimitive(value, ticket)
+		if err != nil {
+			panic(err)
+		}
+		return primitive
+	})
+	return p
+}
+
 // Delete deletes the element of the given index.
 func (p *Array) Delete(idx int) crdt.Element {
-	if p.Len() <= idx {
+	if idx < 0 || p.Len() <= idx {
 		return nil
 	}
 
@@ -381,6 +392,52 @@ func (p *Array) moveBeforeInternal(nextCreatedAt, createdAt *time.Ticket) {
 	}
 }
 
+func (p *Array) moveAfterInternal(prevCreatedAt, createdAt *time.Ticket) {
+	ticket := p.context.IssueTimeTicket()
+
+	p.context.Push(operations.NewMove(
+		p.Array.CreatedAt(),
+		prevCreatedAt,
+		createdAt,
+		ticket,
+	))
+
+	if err := p.MoveAfter(prevCreatedAt, createdAt, ticket); err != nil {
+		panic(err)
+	}
+}
+
+func (p *Array) setByIndexInternal(
+	createdAt *time.Ticket,
+	creator func(ticket *time.Ticket) crdt.Element,
+) crdt.Element {
+	ticket := p.context.IssueTimeTicket()
+	// NOTE(junseo): It uses `creator(createdAt)` instead of `creator(ticket)`
+	// because the new element must have the same `createdAt` as the old element.
+	elem := creator(createdAt)
+	value := toOriginal(elem)
+
+	copiedValue, err := value.DeepCopy()
+	if err != nil {
+		panic(err)
+	}
+	p.context.Push(operations.NewArraySet(
+		p.Array.CreatedAt(),
+		createdAt,
+		copiedValue,
+		ticket,
+	))
+
+	_, err = p.Set(createdAt, value, ticket)
+	if err != nil {
+		panic(err)
+	}
+	// TODO(junseo): GC logic is not implemented here
+	// because there is no way to distinguish between old and new element with same `createdAt`.
+	p.context.RegisterElement(value)
+	return elem
+}
+
 // buildArrayElements return the element slice of the given array.
 // Because the type of the given array is `any`, it is necessary to type assertion.
 func buildArrayElements(
diff --git a/pkg/document/operations/array_set.go b/pkg/document/operations/array_set.go
new file mode 100644
index 000000000..11842a435
--- /dev/null
+++ b/pkg/document/operations/array_set.go
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2024 The Yorkie Authors. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package operations
+
+import (
+	"github.com/yorkie-team/yorkie/pkg/document/crdt"
+	"github.com/yorkie-team/yorkie/pkg/document/time"
+)
+
+// ArraySet is an operation representing setting an element in Array.
+type ArraySet struct {
+	// parentCreatedAt is the creation time of the Array that executes ArraySet.
+	parentCreatedAt *time.Ticket
+
+	// createdAt is the creation time of the target element to set.
+	createdAt *time.Ticket
+
+	// value is an element set by the set_by_index operations.
+	value crdt.Element
+
+	// executedAt is the time the operation was executed.
+	executedAt *time.Ticket
+}
+
+// NewArraySet creates a new instance of ArraySet.
+func NewArraySet(
+	parentCreatedAt *time.Ticket,
+	createdAt *time.Ticket,
+	value crdt.Element,
+	executedAt *time.Ticket,
+) *ArraySet {
+	return &ArraySet{
+		parentCreatedAt: parentCreatedAt,
+		createdAt:       createdAt,
+		value:           value,
+		executedAt:      executedAt,
+	}
+}
+
+// Execute executes this operation on the given document(`root`).
+func (o *ArraySet) Execute(root *crdt.Root) error {
+	parent := root.FindByCreatedAt(o.parentCreatedAt)
+
+	obj, ok := parent.(*crdt.Array)
+	if !ok {
+		return ErrNotApplicableDataType
+	}
+
+	value, err := o.value.DeepCopy()
+	if err != nil {
+		return err
+	}
+
+	_, err = obj.Set(o.createdAt, value, o.executedAt)
+	if err != nil {
+		return err
+	}
+
+	// TODO(junseo): GC logic is not implemented here
+	// because there is no way to distinguish between old and new element with same `createdAt`.
+	root.RegisterElement(value)
+	return nil
+}
+
+// Value returns the value of this operation.
+func (o *ArraySet) Value() crdt.Element {
+	return o.value
+}
+
+// ParentCreatedAt returns the creation time of the Array.
+func (o *ArraySet) ParentCreatedAt() *time.Ticket {
+	return o.parentCreatedAt
+}
+
+// ExecutedAt returns execution time of this operation.
+func (o *ArraySet) ExecutedAt() *time.Ticket {
+	return o.executedAt
+}
+
+// SetActor sets the given actor to this operation.
+func (o *ArraySet) SetActor(actorID *time.ActorID) {
+	o.executedAt = o.executedAt.SetActorID(actorID)
+}
+
+// CreatedAt returns the creation time of the target element.
+func (o *ArraySet) CreatedAt() *time.Ticket {
+	return o.createdAt
+}
diff --git a/server/backend/database/memory/database.go b/server/backend/database/memory/database.go
index 08b2b1364..13a04789c 100644
--- a/server/backend/database/memory/database.go
+++ b/server/backend/database/memory/database.go
@@ -746,6 +746,7 @@ func (d *DB) FindDocInfoByKeyAndOwner(
 			Owner:      clientRefKey.ClientID,
 			ServerSeq:  0,
 			CreatedAt:  now,
+			UpdatedAt:  now,
 			AccessedAt: now,
 		}
 		if err := txn.Insert(tblDocuments, info); err != nil {
@@ -1051,6 +1052,9 @@ func (d *DB) FindChangeInfosBetweenServerSeqs(
 	txn := d.db.Txn(false)
 	defer txn.Abort()
 
+	if from > to {
+		return nil, nil
+	}
 	var infos []*database.ChangeInfo
 
 	iterator, err := txn.LowerBound(
diff --git a/server/backend/database/memory/database_test.go b/server/backend/database/memory/database_test.go
index 5ee6ad0a1..d308940a7 100644
--- a/server/backend/database/memory/database_test.go
+++ b/server/backend/database/memory/database_test.go
@@ -60,6 +60,10 @@ func TestDB(t *testing.T) {
 		testcases.RunFindChangesBetweenServerSeqsTest(t, db, projectID)
 	})
 
+	t.Run("RunFindChangeInfosBetweenServerSeqsTest test", func(t *testing.T) {
+		testcases.RunFindChangeInfosBetweenServerSeqsTest(t, db, projectID)
+	})
+
 	t.Run("RunFindClosestSnapshotInfo test", func(t *testing.T) {
 		testcases.RunFindClosestSnapshotInfoTest(t, db, projectID)
 	})
diff --git a/server/backend/database/mongo/client.go b/server/backend/database/mongo/client.go
index 3d65ff029..16ec85b63 100644
--- a/server/backend/database/mongo/client.go
+++ b/server/backend/database/mongo/client.go
@@ -739,8 +739,9 @@ func (c *Client) FindDocInfoByKeyAndOwner(
 				"owner":      clientRefKey.ClientID,
 				"server_seq": 0,
 				"created_at": now,
+				"updated_at": now,
 			},
-		})
+		}, options.FindOneAndUpdate().SetReturnDocument(options.After))
 	} else {
 		result = c.collection(ColDocuments).FindOne(ctx, filter)
 		if result.Err() == mongo.ErrNoDocuments {
@@ -1030,6 +1031,9 @@ func (c *Client) FindChangeInfosBetweenServerSeqs(
 	from int64,
 	to int64,
 ) ([]*database.ChangeInfo, error) {
+	if from > to {
+		return nil, nil
+	}
 	cursor, err := c.collection(ColChanges).Find(ctx, bson.M{
 		"project_id": docRefKey.ProjectID,
 		"doc_id":     docRefKey.DocID,
diff --git a/server/backend/database/mongo/client_test.go b/server/backend/database/mongo/client_test.go
index 03e596840..6e0803b5d 100644
--- a/server/backend/database/mongo/client_test.go
+++ b/server/backend/database/mongo/client_test.go
@@ -76,6 +76,10 @@ func TestClient(t *testing.T) {
 		testcases.RunFindChangesBetweenServerSeqsTest(t, cli, dummyProjectID)
 	})
 
+	t.Run("RunFindChangeInfosBetweenServerSeqsTest test", func(t *testing.T) {
+		testcases.RunFindChangeInfosBetweenServerSeqsTest(t, cli, dummyProjectID)
+	})
+
 	t.Run("RunFindClosestSnapshotInfo test", func(t *testing.T) {
 		testcases.RunFindClosestSnapshotInfoTest(t, cli, dummyProjectID)
 	})
diff --git a/server/backend/database/testcases/testcases.go b/server/backend/database/testcases/testcases.go
index 06a54bd20..2108f8c83 100644
--- a/server/backend/database/testcases/testcases.go
+++ b/server/backend/database/testcases/testcases.go
@@ -343,6 +343,185 @@ func RunFindChangesBetweenServerSeqsTest(
 	})
 }
 
+// RunFindChangeInfosBetweenServerSeqsTest runs the FindChangeInfosBetweenServerSeqs test for the given db.
+func RunFindChangeInfosBetweenServerSeqsTest(
+	t *testing.T,
+	db database.Database,
+	projectID types.ID,
+) {
+	t.Run("continues editing without any interference from other users test", func(t *testing.T) {
+		ctx := context.Background()
+
+		docKey := key.Key(fmt.Sprintf("tests$%s", t.Name()))
+
+		clientInfo, _ := db.ActivateClient(ctx, projectID, t.Name())
+		docInfo, _ := db.FindDocInfoByKeyAndOwner(ctx, clientInfo.RefKey(), docKey, true)
+		assert.NoError(t, clientInfo.AttachDocument(docInfo.ID, false))
+		assert.NoError(t, db.UpdateClientInfoAfterPushPull(ctx, clientInfo, docInfo))
+
+		updatedClientInfo, _ := db.FindClientInfoByRefKey(ctx, clientInfo.RefKey())
+
+		// Record the serverSeq value at the time the PushPull request came in.
+		initialServerSeq := docInfo.ServerSeq
+
+		// The serverSeq of the checkpoint that the server has should always be the same as
+		// the serverSeq of the user's checkpoint that came in as a request, if no other user interfered.
+		reqPackCheckpointServerSeq := updatedClientInfo.Checkpoint(docInfo.ID).ServerSeq
+
+		changeInfos, err := db.FindChangeInfosBetweenServerSeqs(
+			ctx,
+			docInfo.RefKey(),
+			reqPackCheckpointServerSeq+1,
+			initialServerSeq,
+		)
+
+		assert.NoError(t, err)
+		assert.Len(t, changeInfos, 0)
+	})
+
+	t.Run("retrieving a document with snapshot that reflect the latest doc info test", func(t *testing.T) {
+		ctx := context.Background()
+
+		docKey := key.Key(fmt.Sprintf("tests$%s", t.Name()))
+
+		clientInfo, _ := db.ActivateClient(ctx, projectID, t.Name())
+		docInfo, _ := db.FindDocInfoByKeyAndOwner(ctx, clientInfo.RefKey(), docKey, true)
+		docRefKey := docInfo.RefKey()
+		assert.NoError(t, clientInfo.AttachDocument(docInfo.ID, false))
+		assert.NoError(t, db.UpdateClientInfoAfterPushPull(ctx, clientInfo, docInfo))
+
+		initialServerSeq := docInfo.ServerSeq
+
+		// 01. Create a document and store changes
+		bytesID, _ := clientInfo.ID.Bytes()
+		actorID, _ := time.ActorIDFromBytes(bytesID)
+		doc := document.New(key.Key(t.Name()))
+		doc.SetActor(actorID)
+		assert.NoError(t, doc.Update(func(root *json.Object, p *presence.Presence) error {
+			root.SetNewArray("array")
+			return nil
+		}))
+		for idx := 0; idx < 5; idx++ {
+			assert.NoError(t, doc.Update(func(root *json.Object, p *presence.Presence) error {
+				root.GetArray("array").AddInteger(idx)
+				return nil
+			}))
+		}
+
+		pack := doc.CreateChangePack()
+		for _, c := range pack.Changes {
+			serverSeq := docInfo.IncreaseServerSeq()
+			c.SetServerSeq(serverSeq)
+		}
+
+		err := db.CreateChangeInfos(
+			ctx,
+			projectID,
+			docInfo,
+			initialServerSeq,
+			pack.Changes,
+			false,
+		)
+		assert.NoError(t, err)
+
+		// 02. Create a snapshot that reflect the latest doc info
+		updatedDocInfo, _ := db.FindDocInfoByRefKey(ctx, docRefKey)
+		assert.Equal(t, int64(6), updatedDocInfo.ServerSeq)
+
+		pack = change.NewPack(
+			updatedDocInfo.Key,
+			change.InitialCheckpoint.NextServerSeq(updatedDocInfo.ServerSeq),
+			nil,
+			nil,
+		)
+		assert.NoError(t, doc.ApplyChangePack(pack))
+		assert.Equal(t, int64(6), doc.Checkpoint().ServerSeq)
+
+		assert.NoError(t, db.CreateSnapshotInfo(ctx, docRefKey, doc.InternalDocument()))
+
+		// 03. Find changeInfos with snapshot that reflect the latest doc info
+		snapshotInfo, _ := db.FindClosestSnapshotInfo(
+			ctx,
+			docRefKey,
+			updatedDocInfo.ServerSeq,
+			false,
+		)
+
+		changeInfos, _ := db.FindChangeInfosBetweenServerSeqs(
+			ctx,
+			docRefKey,
+			snapshotInfo.ServerSeq+1,
+			updatedDocInfo.ServerSeq,
+		)
+
+		assert.Len(t, changeInfos, 0)
+	})
+
+	t.Run("store changes and find changes test", func(t *testing.T) {
+		ctx := context.Background()
+
+		docKey := key.Key(fmt.Sprintf("tests$%s", t.Name()))
+
+		clientInfo, _ := db.ActivateClient(ctx, projectID, t.Name())
+		docInfo, _ := db.FindDocInfoByKeyAndOwner(ctx, clientInfo.RefKey(), docKey, true)
+		docRefKey := docInfo.RefKey()
+		assert.NoError(t, clientInfo.AttachDocument(docInfo.ID, false))
+		assert.NoError(t, db.UpdateClientInfoAfterPushPull(ctx, clientInfo, docInfo))
+
+		initialServerSeq := docInfo.ServerSeq
+
+		// 01. Create a document and store changes
+		bytesID, _ := clientInfo.ID.Bytes()
+		actorID, _ := time.ActorIDFromBytes(bytesID)
+		doc := document.New(key.Key(t.Name()))
+		doc.SetActor(actorID)
+		assert.NoError(t, doc.Update(func(root *json.Object, p *presence.Presence) error {
+			root.SetNewArray("array")
+			return nil
+		}))
+		for idx := 0; idx < 5; idx++ {
+			assert.NoError(t, doc.Update(func(root *json.Object, p *presence.Presence) error {
+				root.GetArray("array").AddInteger(idx)
+				return nil
+			}))
+		}
+		pack := doc.CreateChangePack()
+		for _, c := range pack.Changes {
+			serverSeq := docInfo.IncreaseServerSeq()
+			c.SetServerSeq(serverSeq)
+		}
+
+		err := db.CreateChangeInfos(
+			ctx,
+			projectID,
+			docInfo,
+			initialServerSeq,
+			pack.Changes,
+			false,
+		)
+		assert.NoError(t, err)
+
+		// 02. Find changes
+		changeInfos, err := db.FindChangeInfosBetweenServerSeqs(
+			ctx,
+			docRefKey,
+			1,
+			6,
+		)
+		assert.NoError(t, err)
+		assert.Len(t, changeInfos, 6)
+
+		changeInfos, err = db.FindChangeInfosBetweenServerSeqs(
+			ctx,
+			docRefKey,
+			3,
+			3,
+		)
+		assert.NoError(t, err)
+		assert.Len(t, changeInfos, 1)
+	})
+}
+
 // RunFindClosestSnapshotInfoTest runs the FindClosestSnapshotInfo test for the given db.
 func RunFindClosestSnapshotInfoTest(t *testing.T, db database.Database, projectID types.ID) {
 	t.Run("store and find snapshots test", func(t *testing.T) {
@@ -948,6 +1127,9 @@ func RunCreateChangeInfosTest(t *testing.T, db database.Database, projectID type
 		// 01. Create a client and a document then attach the document to the client.
 		clientInfo, _ := db.ActivateClient(ctx, projectID, t.Name())
 		docInfo1, _ := db.FindDocInfoByKeyAndOwner(ctx, clientInfo.RefKey(), docKey, true)
+		assert.Equal(t, docInfo1.Owner, clientInfo.ID)
+		assert.NotEqual(t, gotime.Date(1, gotime.January, 1, 0, 0, 0, 0, gotime.UTC), docInfo1.UpdatedAt)
+		assert.Equal(t, docInfo1.CreatedAt, docInfo1.UpdatedAt)
 		docRefKey := docInfo1.RefKey()
 		assert.NoError(t, clientInfo.AttachDocument(docRefKey.DocID, false))
 		assert.NoError(t, db.UpdateClientInfoAfterPushPull(ctx, clientInfo, docInfo1))
@@ -957,7 +1139,7 @@ func RunCreateChangeInfosTest(t *testing.T, db database.Database, projectID type
 		doc := document.New(key.Key(t.Name()))
 		doc.SetActor(actorID)
 
-		// 02. update document only presence
+		// 02. Update document only presence
 		assert.NoError(t, doc.Update(func(root *json.Object, p *presence.Presence) error {
 			p.Set("key", "val")
 			return nil
@@ -968,7 +1150,7 @@ func RunCreateChangeInfosTest(t *testing.T, db database.Database, projectID type
 		docInfo2, _ := db.FindDocInfoByKeyAndOwner(ctx, clientInfo.RefKey(), docKey, true)
 		assert.Equal(t, updatedAt, docInfo2.UpdatedAt)
 
-		// 03. update document presence and operation
+		// 03. Update document presence and operation
 		assert.NoError(t, doc.Update(func(root *json.Object, p *presence.Presence) error {
 			p.Set("key", "val")
 			root.SetNewArray("array")
diff --git a/server/profiling/prometheus/metrics.go b/server/profiling/prometheus/metrics.go
index 1f2c2fe76..aa2155273 100644
--- a/server/profiling/prometheus/metrics.go
+++ b/server/profiling/prometheus/metrics.go
@@ -54,6 +54,8 @@ type Metrics struct {
 	serverVersion        *prometheus.GaugeVec
 	serverHandledCounter *prometheus.CounterVec
 
+	backgroundGoroutinesTotal *prometheus.GaugeVec
+
 	pushPullResponseSeconds         prometheus.Histogram
 	pushPullReceivedChangesTotal    prometheus.Counter
 	pushPullSentChangesTotal        prometheus.Counter
@@ -62,7 +64,8 @@ type Metrics struct {
 	pushPullSnapshotDurationSeconds prometheus.Histogram
 	pushPullSnapshotBytesTotal      prometheus.Counter
 
-	backgroundGoroutinesTotal *prometheus.GaugeVec
+	watchDocumentConnectionTotal   *prometheus.GaugeVec
+	watchDocumentPayloadBytesTotal *prometheus.GaugeVec
 
 	userAgentTotal *prometheus.CounterVec
 }
@@ -143,6 +146,16 @@ func NewMetrics() (*Metrics, error) {
 			Name:      "goroutines_total",
 			Help:      "The total number of goroutines attached by a particular background task.",
 		}, []string{taskTypeLabel}),
+		watchDocumentConnectionTotal: promauto.With(reg).NewGaugeVec(prometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: "stream",
+			Name:      "watch_document_stream_connection_total",
+			Help:      "The total number of document watch stream connection.",
+		}, []string{
+			projectIDLabel,
+			projectNameLabel,
+			hostnameLabel,
+		}),
 		userAgentTotal: promauto.With(reg).NewCounterVec(prometheus.CounterOpts{
 			Namespace: namespace,
 			Subsystem: "user_agent",
@@ -257,6 +270,24 @@ func (m *Metrics) RemoveBackgroundGoroutines(taskType string) {
 	}).Dec()
 }
 
+// AddWatchDocumentConnection adds the number of document watch stream connection.
+func (m *Metrics) AddWatchDocumentConnection(hostname string, project *types.Project) {
+	m.watchDocumentConnectionTotal.With(prometheus.Labels{
+		projectIDLabel:   project.ID.String(),
+		projectNameLabel: project.Name,
+		hostnameLabel:    hostname,
+	}).Inc()
+}
+
+// RemoveWatchDocumentConnection removes the number of document watch stream connection.
+func (m *Metrics) RemoveWatchDocumentConnection(hostname string, project *types.Project) {
+	m.watchDocumentConnectionTotal.With(prometheus.Labels{
+		projectIDLabel:   project.ID.String(),
+		projectNameLabel: project.Name,
+		hostnameLabel:    hostname,
+	}).Dec()
+}
+
 // Registry returns the registry of this metrics.
 func (m *Metrics) Registry() *prometheus.Registry {
 	return m.registry
diff --git a/server/rpc/yorkie_server.go b/server/rpc/yorkie_server.go
index 22f5ee995..86c273080 100644
--- a/server/rpc/yorkie_server.go
+++ b/server/rpc/yorkie_server.go
@@ -430,8 +430,13 @@ func (s *yorkieServer) WatchDocument(
 		logging.From(ctx).Error(err)
 		return err
 	}
+	s.backend.Metrics.AddWatchDocumentConnection(s.backend.Config.Hostname, project)
 	defer func() {
-		s.unwatchDoc(subscription, docRefKey)
+		if err := s.unwatchDoc(subscription, docRefKey); err != nil {
+			logging.From(ctx).Error(err)
+		} else {
+			s.backend.Metrics.RemoveWatchDocumentConnection(s.backend.Config.Hostname, project)
+		}
 	}()
 
 	var pbClientIDs []string
@@ -583,9 +588,14 @@ func (s *yorkieServer) watchDoc(
 func (s *yorkieServer) unwatchDoc(
 	subscription *sync.Subscription,
 	documentRefKey types.DocRefKey,
-) {
+) error {
 	ctx := context.Background()
-	_ = s.backend.Coordinator.Unsubscribe(ctx, documentRefKey, subscription)
+	err := s.backend.Coordinator.Unsubscribe(ctx, documentRefKey, subscription)
+	if err != nil {
+		logging.From(ctx).Error(err)
+		return err
+	}
+
 	s.backend.Coordinator.Publish(
 		ctx,
 		subscription.Subscriber(),
@@ -595,6 +605,8 @@ func (s *yorkieServer) unwatchDoc(
 			DocumentRefKey: documentRefKey,
 		},
 	)
+
+	return nil
 }
 
 func (s *yorkieServer) Broadcast(
diff --git a/test/integration/array_test.go b/test/integration/array_test.go
index f4935ef8a..5d41db06b 100644
--- a/test/integration/array_test.go
+++ b/test/integration/array_test.go
@@ -471,3 +471,139 @@ func TestArraySet(t *testing.T) {
 		})
 	}
 }
+
+func TestArrayConcurrencyTable(t *testing.T) {
+	clients := activeClients(t, 2)
+	c0, c1 := clients[0], clients[1]
+	defer deactivateAndCloseClients(t, clients)
+
+	initArr := []int{1, 2, 3, 4}
+	initMarshal := `[1,2,3,4]`
+	oneIdx := 1
+	otherIdxs := []int{2, 3}
+	newValues := []int{5, 6}
+
+	type arrayOp struct {
+		opName   string
+		executor func(*json.Array, int)
+	}
+
+	// NOTE(junseo): It tests all (op1, op2) pairs in operations.
+	// `oneIdx` is the index where both op1 and op2 reference.
+	// `opName` represents the parameter of operation selected as `oneIdx'.
+	// `otherIdxs` ensures that indexs other than `oneIdx` are not duplicated.
+	operations := []arrayOp{
+		// insert
+		{"insert.prev", func(a *json.Array, cid int) {
+			a.InsertIntegerAfter(oneIdx, newValues[cid])
+		}},
+		{"insert.prev.next", func(a *json.Array, cid int) {
+			a.InsertIntegerAfter(oneIdx-1, newValues[cid])
+		}},
+
+		// move
+		{"move.prev", func(a *json.Array, cid int) {
+			a.MoveAfterByIndex(oneIdx, otherIdxs[cid])
+		}},
+		{"move.prev.next", func(a *json.Array, cid int) {
+			a.MoveAfterByIndex(oneIdx-1, otherIdxs[cid])
+		}},
+		{"move.target", func(a *json.Array, cid int) {
+			a.MoveAfterByIndex(otherIdxs[cid], oneIdx)
+		}},
+
+		// set by index
+		{"set.target", func(a *json.Array, cid int) {
+			a.SetInteger(oneIdx, newValues[cid])
+		}},
+
+		// remove
+		{"remove.target", func(a *json.Array, cid int) {
+			a.Delete(oneIdx)
+		}},
+	}
+
+	ctx := context.Background()
+	d0 := document.New(helper.TestDocKey(t))
+	assert.NoError(t, c0.Attach(ctx, d0))
+	d1 := document.New(helper.TestDocKey(t))
+	assert.NoError(t, c1.Attach(ctx, d1))
+
+	runTest := func(op1, op2 arrayOp) testResult {
+		assert.NoError(t, d0.Update(func(root *json.Object, p *presence.Presence) error {
+			root.SetNewArray("a").AddInteger(initArr...)
+			assert.Equal(t, initMarshal, root.GetArray("a").Marshal())
+			return nil
+		}))
+
+		assert.NoError(t, c0.Sync(ctx))
+		assert.NoError(t, c1.Sync(ctx))
+
+		assert.NoError(t, d0.Update(func(root *json.Object, p *presence.Presence) error {
+			op1.executor(root.GetArray("a"), 0)
+			return nil
+		}))
+
+		assert.NoError(t, d1.Update(func(root *json.Object, p *presence.Presence) error {
+			op2.executor(root.GetArray("a"), 1)
+			return nil
+		}))
+
+		flag := syncClientsThenCheckEqual(t, []clientAndDocPair{{c0, d0}, {c1, d1}})
+		if flag {
+			return testResult{flag, `pass`}
+		}
+		return testResult{flag, `different result`}
+	}
+
+	for _, op1 := range operations {
+		for _, op2 := range operations {
+			t.Run(op1.opName+" vs "+op2.opName, func(t *testing.T) {
+				result := runTest(op1, op2)
+				if !result.flag {
+					t.Skip(result.resultDesc)
+				}
+			})
+		}
+	}
+}
+
+func TestArraySetByIndex(t *testing.T) {
+	clients := activeClients(t, 2)
+	c1, c2 := clients[0], clients[1]
+	defer deactivateAndCloseClients(t, clients)
+
+	t.Run("array set simple test", func(t *testing.T) {
+		ctx := context.Background()
+		d1 := document.New(helper.TestDocKey(t))
+		err := c1.Attach(ctx, d1)
+		assert.NoError(t, err)
+
+		d2 := document.New(helper.TestDocKey(t))
+		err = c2.Attach(ctx, d2)
+		assert.NoError(t, err)
+
+		assert.NoError(t, d1.Update(func(root *json.Object, p *presence.Presence) error {
+			root.SetNewArray("k1").AddInteger(-1, -2, -3)
+			assert.Equal(t, `{"k1":[-1,-2,-3]}`, root.Marshal())
+			return nil
+		}, "add -1, -2, -3 by c1"))
+
+		assert.NoError(t, c1.Sync(ctx))
+		assert.NoError(t, c2.Sync(ctx))
+
+		assert.NoError(t, d2.Update(func(root *json.Object, p *presence.Presence) error {
+			root.GetArray("k1").SetInteger(1, -4)
+			assert.Equal(t, `{"k1":[-1,-4,-3]}`, root.Marshal())
+			return nil
+		}, "set k1[1] to -4 by c2"))
+
+		assert.NoError(t, d1.Update(func(root *json.Object, p *presence.Presence) error {
+			root.GetArray("k1").SetInteger(0, -5)
+			assert.Equal(t, `{"k1":[-5,-2,-3]}`, root.Marshal())
+			return nil
+		}, "set k1[0] to -5 by c1"))
+
+		syncClientsThenAssertEqual(t, []clientAndDocPair{{c1, d1}, {c2, d2}})
+	})
+}
diff --git a/test/sharding/mongo_client_test.go b/test/sharding/mongo_client_test.go
index 0653e0200..5cb2bffe6 100644
--- a/test/sharding/mongo_client_test.go
+++ b/test/sharding/mongo_client_test.go
@@ -85,6 +85,10 @@ func TestClientWithShardedDB(t *testing.T) {
 		testcases.RunFindChangesBetweenServerSeqsTest(t, cli, dummyProjectID)
 	})
 
+	t.Run("RunFindChangeInfosBetweenServerSeqsTest test", func(t *testing.T) {
+		testcases.RunFindChangeInfosBetweenServerSeqsTest(t, cli, dummyProjectID)
+	})
+
 	t.Run("RunFindClosestSnapshotInfo test", func(t *testing.T) {
 		testcases.RunFindClosestSnapshotInfoTest(t, cli, dummyProjectID)
 	})