diff --git a/service/app/admin/controller/QaController.php b/service/app/admin/controller/QaController.php
index d02d2064..60cd72fa 100644
--- a/service/app/admin/controller/QaController.php
+++ b/service/app/admin/controller/QaController.php
@@ -118,7 +118,7 @@ class QaController extends base
         if (isset($post['update_time'])) {
             unset($post['update_time']);
         }
-        if (isset($post['update_time'])) {
+        if (isset($post['id'])) {
             unset($post['id']);
         }
         $post['create_time'] = time();