diff --git a/migration/v14/model/core.go b/migration/v14/model/core.go
index 0a7541dd4..06c02bd6d 100644
--- a/migration/v14/model/core.go
+++ b/migration/v14/model/core.go
@@ -135,7 +135,7 @@ type Task struct {
 	Retries       int
 	Attached      []Attachment `gorm:"type:json;serializer:json" ref:"[]file"`
 	Report        *TaskReport  `gorm:"constraint:OnDelete:CASCADE"`
-	ApplicationID *uint
+	ApplicationID *uint        `gorm:"index"`
 	Application   *Application
 	TaskGroupID   *uint `gorm:"<-:create"`
 	TaskGroup     *TaskGroup