diff --git a/flyteartifacts/pkg/db/gorm_models.go b/flyteartifacts/pkg/db/gorm_models.go
index 101435a843..c13068b839 100644
--- a/flyteartifacts/pkg/db/gorm_models.go
+++ b/flyteartifacts/pkg/db/gorm_models.go
@@ -44,9 +44,9 @@ type Artifact struct {
 
 type TriggerKey struct {
 	gorm.Model
-	Project string        `gorm:"index:idx_pdn;index:idx_proj;type:varchar(64)"`
-	Domain  string        `gorm:"index:idx_pdn;index:idx_dom;type:varchar(64)"`
-	Name    string        `gorm:"index:idx_pdn;index:idx_name;type:varchar(255)"`
+	Project string        `gorm:"uniqueIndex:idx_t_pdn;index:idx_t_proj;type:varchar(64)"`
+	Domain  string        `gorm:"uniqueIndex:idx_t_pdn;index:idx_t_dom;type:varchar(64)"`
+	Name    string        `gorm:"uniqueIndex:idx_t_pdn;index:idx_t_name;type:varchar(255)"`
 	RunsOn  []ArtifactKey `gorm:"many2many:active_trigger_artifact_keys;"`
 }
 
diff --git a/flyteartifacts/pkg/db/migrations.go b/flyteartifacts/pkg/db/migrations.go
index e91552f3e6..b09755115e 100644
--- a/flyteartifacts/pkg/db/migrations.go
+++ b/flyteartifacts/pkg/db/migrations.go
@@ -60,9 +60,9 @@ var Migrations = []*gormigrate.Migration{
 		Migrate: func(tx *gorm.DB) error {
 			type TriggerKey struct {
 				gorm.Model
-				Project string        `gorm:"index:idx_t_pdn;index:idx_t_proj;type:varchar(64)"`
-				Domain  string        `gorm:"index:idx_t_pdn;index:idx_t_dom;type:varchar(64)"`
-				Name    string        `gorm:"index:idx_t_pdn;index:idx_t_name;type:varchar(255)"`
+				Project string        `gorm:"uniqueIndex:idx_t_pdn;index:idx_t_proj;type:varchar(64)"`
+				Domain  string        `gorm:"uniqueIndex:idx_t_pdn;index:idx_t_dom;type:varchar(64)"`
+				Name    string        `gorm:"uniqueIndex:idx_t_pdn;index:idx_t_name;type:varchar(255)"`
 				RunsOn  []ArtifactKey `gorm:"many2many:active_trigger_artifact_keys;"`
 			}