diff --git a/apps/wpmw/models.py b/apps/wpmw/models.py
index 7032878d..c78512f0 100644
--- a/apps/wpmw/models.py
+++ b/apps/wpmw/models.py
@@ -72,6 +72,7 @@ class Wpr(BaseModel):
             if wm.defect:
                 WprDefect.objects.create(wpr=ins, defect=wm.defect, is_main=True)
         ins.version = ins.version + 1
+        ins.oinfo = ins.oinfo if ins.oinfo else {}
         ins.save()
         if ftest: 
             # 通过检验变更其缺陷项