diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index ba3fab46..8049813a 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -885,17 +885,17 @@ class MlogbOutUpdateSerializer(CustomModelSerializer):
         mlogbdefect = attrs.get("mlogbdefect", [])
         if mlogbdefect:
             attrs.pop("count_notok_json", None)
-            for i in attrs:
-                if 'count_n_' in i:
-                    attrs.pop(i, None)
+            for k in list(attrs.keys()):
+                if 'count_n_' in k:
+                    attrs.pop(k, None)
         else:
             count_notok_json = attrs.get('count_notok_json', [])
             # count_notok_json字段处理
             if count_notok_json:
                 # 先置0字段
-                for i in attrs:
-                    if 'count_n_' in i:
-                        i = 0
+                for k in list(attrs.keys()):
+                    if 'count_n_' in k:
+                        attrs[k] = 0
                 count_notok_dict = {}
                 for item in count_notok_json:
                     notok = item['notok']
@@ -911,11 +911,11 @@ class MlogbOutUpdateSerializer(CustomModelSerializer):
                     attrs[k] = v
 
             count_notok = 0
-            for i in attrs:
-                if 'count_n_' in i:
-                    if not hasattr(Mlogb, i):
-                        raise ParseError(f'{i}不存在')
-                    count_notok = count_notok + attrs[i]
+            for k in list(attrs.keys()):
+                if 'count_n_' in k:
+                    if not hasattr(Mlogb, k):
+                        raise ParseError(f'{k}不存在')
+                    count_notok = count_notok + attrs[k]
             attrs['count_notok'] = count_notok
             if attrs['count_real'] >= attrs['count_ok'] + attrs['count_notok']:
                 pass