diff --git a/webapp/controller/KefuController.class.php b/webapp/controller/KefuController.class.php
index 659fb67..6fa27e7 100644
--- a/webapp/controller/KefuController.class.php
+++ b/webapp/controller/KefuController.class.php
@@ -208,6 +208,17 @@ class KefuController {
         }
     }
 
+    protected function delOvertimeOpenid($accountid)
+    {
+        $conn = $this->getMysql($accountid);
+        error_log('del:' . $accountid);
+        $ret = $conn->execScript('DELETE FROM accounts ' .
+                                 'WHERE accountid=:accountid;',
+                                 array(
+                                     ':accountid' => $accountid,
+                                 ));
+    }
+
     private function sendKefuMsg($accountid, $data)
     {
         try {
@@ -231,6 +242,7 @@ class KefuController {
                 if ($ret_info['errcode'] == 40003) {
                     //无效的openid，（更换appid appkey导致之前的openid失效）
                     //从db里删除这种过期的openid
+                    $this->delOvertimeOpenid($accountid);
                     return true;
                 }
                 error_log('重新获取access_token');