diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 8c3850a5..7bd6adfc 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -129,7 +129,8 @@ class MlogSerializer(CustomModelSerializer):
         handle_user = validated_data['handle_user']
         if mtask:
             validated_data['mgroup'] = mtask.mgroup
-            validated_data['material_out'] = mtask.material_out
+            material_out = mtask.material_out
+            validated_data['material_out'] = material_out
             # if  not WMaterial.objects.filter(batch=batch).exists():
             #     raise ValidationError('批次号不存在')
         else: