diff --git a/apps/wpmw/models.py b/apps/wpmw/models.py
index b032f930..91050c16 100644
--- a/apps/wpmw/models.py
+++ b/apps/wpmw/models.py
@@ -53,6 +53,9 @@ class Wpr(BaseModel):
         if wm:
             ins.material = wm.material
             ins.state = wm.state
+            WprDefect.objects.filter(wpr=ins).delete()
+            if wm.defect:
+                WprDefect.objects.create(wpr=ins, defect=wm.defect, is_main=True)
         ins.save()
         if ftest: # 通过检验变更其缺陷项
             WprDefect.objects.filter(wpr=ins).delete()