diff --git a/apps/inm/services.py b/apps/inm/services.py
index b7f9554d..d4bcf142 100644
--- a/apps/inm/services.py
+++ b/apps/inm/services.py
@@ -440,7 +440,7 @@ class InmService:
 
     @classmethod
     def revert_and_del(cls, mioitem: MIOItem):
-        mio:MIO = MIOItem.mio
+        mio = mioitem.mio
         if mio.submit_time is None:
             raise ParseError("未提交的出入库明细不允许撤销")
         if mioitem.test_date is not None: