From 38137c5960529b5426143c31b5ea3bfc4c6844f9 Mon Sep 17 00:00:00 2001
From: = <=>
Date: Mon, 25 Apr 2022 17:23:12 +0800
Subject: [PATCH] * Fix bug #21992.

---
 module/story/model.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/module/story/model.php b/module/story/model.php
index 9cae0c63fd..2112090ccf 100644
--- a/module/story/model.php
+++ b/module/story/model.php
@@ -253,7 +253,8 @@ class storyModel extends model
         {
             $storyID = $this->dao->lastInsertID();
 
-            if($story->parent)
+            /* Fix bug #21992, user story have no parent story. */
+            if(isset($story->parent) and $story->parent)
             {
                 $stories = array($storyID);
                 $this->subdivide($story->parent, $stories);