diff --git a/model/main.go b/model/main.go
index 7b1cd3d..b6ad2cb 100644
--- a/model/main.go
+++ b/model/main.go
@@ -93,12 +93,12 @@ func InitDB() (err error) {
 		if !common.IsMasterNode {
 			return nil
 		}
-		if common.UsingMySQL {
-			_, _ = sqlDB.Exec("DROP INDEX idx_channels_key ON channels;")             // TODO: delete this line when most users have upgraded
-			_, _ = sqlDB.Exec("ALTER TABLE midjourneys MODIFY action VARCHAR(40);")   // TODO: delete this line when most users have upgraded
-			_, _ = sqlDB.Exec("ALTER TABLE midjourneys MODIFY progress VARCHAR(30);") // TODO: delete this line when most users have upgraded
-			_, _ = sqlDB.Exec("ALTER TABLE midjourneys MODIFY status VARCHAR(20);")   // TODO: delete this line when most users have upgraded
-		}
+		//if common.UsingMySQL {
+		//	_, _ = sqlDB.Exec("DROP INDEX idx_channels_key ON channels;")             // TODO: delete this line when most users have upgraded
+		//	_, _ = sqlDB.Exec("ALTER TABLE midjourneys MODIFY action VARCHAR(40);")   // TODO: delete this line when most users have upgraded
+		//	_, _ = sqlDB.Exec("ALTER TABLE midjourneys MODIFY progress VARCHAR(30);") // TODO: delete this line when most users have upgraded
+		//	_, _ = sqlDB.Exec("ALTER TABLE midjourneys MODIFY status VARCHAR(20);")   // TODO: delete this line when most users have upgraded
+		//}
 		common.SysLog("database migration started")
 		err = db.AutoMigrate(&Channel{})
 		if err != nil {
diff --git a/model/token.go b/model/token.go
index 1bbf6c4..056156e 100644
--- a/model/token.go
+++ b/model/token.go
@@ -11,7 +11,7 @@ import (
 
 type Token struct {
 	Id                 int            `json:"id"`
-	UserId             int            `json:"user_id"`
+	UserId             int            `json:"user_id" gorm:"index"`
 	Key                string         `json:"key" gorm:"type:char(48);uniqueIndex"`
 	Status             int            `json:"status" gorm:"default:1"`
 	Name               string         `json:"name" gorm:"index" `