diff --git a/test_server/crm/models.py b/test_server/crm/models.py
index b4fe073..2df3f82 100644
--- a/test_server/crm/models.py
+++ b/test_server/crm/models.py
@@ -106,8 +106,8 @@ class SendCode(CommonModel):
 
 class Candidate(CommonModel):
     consumer = models.ForeignKey(Consumer, on_delete=models.SET_NULL, related_name='candidate_consumer', null=True, blank=True)
-    workscope = models.ForeignKey(WorkScope, on_delete=models.DO_NOTHING, related_name='candidate_workscope', null=True, blank=True)
-    examtest = models.OneToOneField(to='examtest.examtest', verbose_name='关联考试', null=True, blank=True, on_delete=models.DO_NOTHING)
+    workscope = models.ForeignKey(WorkScope, on_delete=models.SET_NULL, related_name='candidate_workscope', null=True, blank=True)
+    examtest = models.OneToOneField(to='examtest.examtest', verbose_name='关联考试', null=True, blank=True, on_delete=models.SET_NULL)
     is_manual = models.BooleanField('是否手动创建', default=False)
 
     # 下面是证书信息