diff --git a/go.mod b/go.mod
index b793394d8d2..b6e7df0a899 100644
--- a/go.mod
+++ b/go.mod
@@ -11,7 +11,7 @@ require (
 	github.com/DataDog/zstd v1.5.2
 	github.com/Microsoft/go-winio v0.5.2
 	github.com/NYTimes/gziphandler v1.1.1
-	github.com/ava-labs/coreth v0.12.10-rc.0
+	github.com/ava-labs/coreth v0.12.9-rc.6.0.20231206185214-891ed824c9f9
 	github.com/ava-labs/ledger-avalanche/go v0.0.0-20231102202641-ae2ebdaeac34
 	github.com/btcsuite/btcd/btcutil v1.1.3
 	github.com/cockroachdb/pebble v0.0.0-20230209160836-829675f94811
diff --git a/go.sum b/go.sum
index 7b9a76de966..2bdccdd5ea6 100644
--- a/go.sum
+++ b/go.sum
@@ -66,6 +66,8 @@ github.com/allegro/bigcache v1.2.1-0.20190218064605-e24eb225f156 h1:eMwmnE/GDgah
 github.com/allegro/bigcache v1.2.1-0.20190218064605-e24eb225f156/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2ucNfQESPXM=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/ava-labs/coreth v0.12.9-rc.6.0.20231206185214-891ed824c9f9 h1:7XHNi4RPyFF6Pu/spRd3z/hJgsrbxoJ2RV2wtx9TZAM=
+github.com/ava-labs/coreth v0.12.9-rc.6.0.20231206185214-891ed824c9f9/go.mod h1:PXsfjJVVlHDjdZ9FixIGijVvL3H1GC00heExDMt6Do8=
 github.com/ava-labs/coreth v0.12.10-rc.0 h1:qmuom7rtH5hc1E3lnqrMFNLFL1TMnEVa/2O8poB1YLU=
 github.com/ava-labs/coreth v0.12.10-rc.0/go.mod h1:plFm/xzvWmx1+qJ3JQSTzF8+FdaA2xu7GgY/AdaZDfk=
 github.com/ava-labs/ledger-avalanche/go v0.0.0-20231102202641-ae2ebdaeac34 h1:mg9Uw6oZFJKytJxgxnl3uxZOs/SB8CVHg6Io4Tf99Zc=
diff --git a/network/p2p/network_test.go b/network/p2p/network_test.go
index 590858a0c46..17b02a3fa0a 100644
--- a/network/p2p/network_test.go
+++ b/network/p2p/network_test.go
@@ -25,6 +25,11 @@ import (
 	"github.com/ava-labs/avalanchego/version"
 )
 
+var errFoo = &common.AppError{
+	Code:    123,
+	Message: "foo",
+}
+
 func TestAppRequestResponse(t *testing.T) {
 	handlerID := uint64(0x0)
 	request := []byte("request")
@@ -85,7 +90,7 @@ func TestAppRequestResponse(t *testing.T) {
 				sender.SendAppRequestF = func(ctx context.Context, nodeIDs set.Set[ids.NodeID], requestID uint32, request []byte) error {
 					for range nodeIDs {
 						go func() {
-							require.NoError(t, network.AppRequestFailed(ctx, nodeID, requestID))
+							require.NoError(t, network.AppRequestFailed(ctx, nodeID, requestID, errFoo))
 						}()
 					}
 
@@ -95,7 +100,7 @@ func TestAppRequestResponse(t *testing.T) {
 				callback := func(_ context.Context, actualNodeID ids.NodeID, actualResponse []byte, err error) {
 					defer wg.Done()
 
-					require.ErrorIs(t, err, ErrAppRequestFailed)
+					require.ErrorIs(t, err, errFoo)
 					require.Equal(t, nodeID, actualNodeID)
 					require.Nil(t, actualResponse)
 				}
@@ -140,14 +145,14 @@ func TestAppRequestResponse(t *testing.T) {
 			requestFunc: func(t *testing.T, network *Network, client *Client, sender *common.SenderTest, handler *mocks.MockHandler, wg *sync.WaitGroup) {
 				sender.SendCrossChainAppRequestF = func(ctx context.Context, chainID ids.ID, requestID uint32, request []byte) {
 					go func() {
-						require.NoError(t, network.CrossChainAppRequestFailed(ctx, chainID, requestID))
+						require.NoError(t, network.CrossChainAppRequestFailed(ctx, chainID, requestID, errFoo))
 					}()
 				}
 
 				callback := func(_ context.Context, actualChainID ids.ID, actualResponse []byte, err error) {
 					defer wg.Done()
 
-					require.ErrorIs(t, err, ErrAppRequestFailed)
+					require.ErrorIs(t, err, errFoo)
 					require.Equal(t, chainID, actualChainID)
 					require.Nil(t, actualResponse)
 				}
@@ -273,7 +278,7 @@ func TestNetworkDropMessage(t *testing.T) {
 		{
 			name: "drop unrequested app request failed",
 			requestFunc: func(network *Network) error {
-				return network.AppRequestFailed(context.Background(), ids.GenerateTestNodeID(), 0)
+				return network.AppRequestFailed(context.Background(), ids.GenerateTestNodeID(), 0, errFoo)
 			},
 			err: ErrUnrequestedResponse,
 		},
@@ -287,7 +292,7 @@ func TestNetworkDropMessage(t *testing.T) {
 		{
 			name: "drop unrequested cross-chain request failed",
 			requestFunc: func(network *Network) error {
-				return network.CrossChainAppRequestFailed(context.Background(), ids.GenerateTestID(), 0)
+				return network.CrossChainAppRequestFailed(context.Background(), ids.GenerateTestID(), 0, errFoo)
 			},
 			err: ErrUnrequestedResponse,
 		},
diff --git a/x/sync/mock_network_client.go b/x/sync/mock_network_client.go
index eeff3d6ee21..8021a015f06 100644
--- a/x/sync/mock_network_client.go
+++ b/x/sync/mock_network_client.go
@@ -37,9 +37,9 @@ func (m *MockNetworkClient) EXPECT() *MockNetworkClientMockRecorder {
 }
 
 // AppRequestFailed mocks base method.
-func (m *MockNetworkClient) AppRequestFailed(arg0 context.Context, arg1 ids.NodeID, arg2 uint32, arg3 error) error {
+func (m *MockNetworkClient) AppRequestFailed(arg0 context.Context, arg1 ids.NodeID, arg2 uint32) error {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "AppRequestFailed", arg0, arg1, arg2, arg3)
+	ret := m.ctrl.Call(m, "AppRequestFailed", arg0, arg1, arg2)
 	ret0, _ := ret[0].(error)
 	return ret0
 }