diff --git a/controllers/AssignController.php b/controllers/AssignController.php
index 8940d0b8..e4563767 100644
--- a/controllers/AssignController.php
+++ b/controllers/AssignController.php
@@ -94,7 +94,9 @@ class AssignController extends Controller {
             $lists = Staff::find()->andWhere(["IN", "id", $post["staffs"]])->all();
             foreach ($lists as $key => $value) {
                 $value->schedule_id = $post["schedule"];
-                $value->door_access_old = $value->door_access;
+                if ($value->door_access !== json_encode($post["doors"])) {
+                    $value->door_access_old = $value->door_access;
+                }
                 $value->door_access = json_encode($post["doors"]);
                 $value->save();
             }