diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 2f20ddad..4e3c1401 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -107,8 +107,8 @@ class MlogSerializer(CustomModelSerializer):
             material_out = validated_data['material_out']
             if not (mgroup and material_out):
                 raise ValidationError('缺少工段或产物!')
-        if not WMaterial.objects.filter(batch=batch).exists():
-            raise ValidationError('批次号不存在')
+            if not WMaterial.objects.filter(batch=batch).exists():
+                raise ValidationError('批次号不存在')
         if Mlog.objects.filter(mtask=mtask, batch=batch, handle_date=handle_date, handle_user=handle_user).exists():
             raise ValidationError('存在相同的日志记录')
         return super().create(validated_data)