diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 28e5a2f3..02651205 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -581,6 +581,7 @@ class MlogbwCreateUpdateSerializer(CustomModelSerializer):
             raise ParseError("非追踪单件无需填写")
         if material_out and material_out.tracking != Material.MA_TRACKING_SINGLE:
             raise ParseError("非追踪单件无需填写")
+        return attrs
 
     def update(self, instance, validated_data):
         validated_data.pop("mlogb")