diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 45007239..60a70e6b 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -561,7 +561,7 @@ def handover_submit(handover: Handover, user: User, now: Union[datetime.datetime
     if handover.submit_time is not None:
         return
     now = timezone.now()
-    handoverb_qs = Handover.objects.filter(handover=handover)
+    handoverb_qs = Handoverb.objects.filter(handover=handover)
     need_add = True
     material = handover.material
     if '混料' in material.name:  # hard code