diff --git a/apps/qm/serializers.py b/apps/qm/serializers.py
index a7cc4b79..5cd71303 100644
--- a/apps/qm/serializers.py
+++ b/apps/qm/serializers.py
@@ -300,18 +300,18 @@ class FtestProcessSerializer(CustomModelSerializer):
         with transaction.atomic():
             instance = super().update(instance, validated_data)
             for item in ftestitems:
-                ins, is_create = FtestItem.objects.get_or_create(
-                    testitem = item["testitem"], ftest=instance, defaults=item)
-                if is_create:
+                try:
+                    ins = FtestItem.objects.get(testitem = item["testitem"], ftest=instance)
+                except FtestItem.DoesNotExist:
                     raise ParseError("新的检测项!")
                 for k, v in item.items():
                     setattr(ins, k, v)
                 ins.save()
             is_ok = True
             for item2 in ftestdefects:
-                ins, is_create = FtestDefect.objects.get_or_create(
-                    ftest=instance, defect=item2["defect"], defaults=item2)
-                if is_create:
+                try:
+                    ins = FtestDefect.objects.get(ftest=instance, defect=item2["defect"])
+                except FtestDefect.DoesNotExist:
                     raise ParseError("新的缺陷项!")
                 for k, v in item2.items():
                     setattr(ins, k, v)