diff --git a/pkg/common/db/mgo/user.go b/pkg/common/db/mgo/user.go
index b82966371..d2beafd49 100644
--- a/pkg/common/db/mgo/user.go
+++ b/pkg/common/db/mgo/user.go
@@ -83,7 +83,7 @@ func (u *UserMgo) PageFindUser(ctx context.Context, level int64, pagination pagi
 }
 
 func (u *UserMgo) GetAllUserID(ctx context.Context, pagination pagination.Pagination) (int64, []string, error) {
-	return mgoutil.FindPage[string](ctx, u.coll, bson.M{}, pagination, options.Find().SetProjection(bson.M{"user_id": 1}))
+	return mgoutil.FindPage[string](ctx, u.coll, bson.M{}, pagination, options.Find().SetProjection(bson.M{"_id": 0, "user_id": 1}))
 }
 
 func (u *UserMgo) Exist(ctx context.Context, userID string) (exist bool, err error) {