diff --git a/backend/app/api/routers/request/dbOrm.py b/backend/app/api/routers/request/dbOrm.py
index 71cd1cd..ac277c3 100644
--- a/backend/app/api/routers/request/dbOrm.py
+++ b/backend/app/api/routers/request/dbOrm.py
@@ -178,7 +178,8 @@ class DBManager:
             return 
         records = session.query(ormCls).filter_by(**filter).all()
         if records is not None:
-            session.delete(records)
+            for record in records:
+                session.delete(record)
             session.commit()
     
     def update(self,tableName:str,data:Dict[str,Any],**filter):