diff --git a/apps/wpm/views.py b/apps/wpm/views.py
index 4e802fdf..effe351c 100644
--- a/apps/wpm/views.py
+++ b/apps/wpm/views.py
@@ -971,9 +971,9 @@ class MlogbwViewSet(CustomModelViewSet):
     def after_bulk_update(self, objs):
         mlogbIds = list(set([obj["mlogb"] for obj in objs]))
         for mlogbId in mlogbIds:
-            mlogbw = Mlogbw.objects.get(id=mlogbId)
-            Mlogbw.cal_count_notok(mlogbw.mlogb)
-            mlog = mlogbw.mlogb.mlog
+            mlogb = Mlogb.objects.get(id=mlogbId)
+            Mlogbw.cal_count_notok(mlogb)
+            mlog = mlogb.mlog
             mlog.cal_mlog_count_from_mlogb()
 
     @transaction.atomic