From f6ec44cd0658030ca120f443babb1df9eb3995d4 Mon Sep 17 00:00:00 2001
From: hufangzhou <hufangzhou@easycorp.ltd>
Date: Tue, 21 Mar 2023 10:20:06 +0800
Subject: [PATCH] * Fix bug #33128.

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

diff --git a/module/story/model.php b/module/story/model.php
index 0dc3182546..f1f15dce69 100644
--- a/module/story/model.php
+++ b/module/story/model.php
@@ -4616,7 +4616,7 @@ class storyModel extends model
                     if($canCreateCase and ($canClose or $canUnlinkStory)) $menu .= "<div class='dividing-line'></div>";
 
                     $menu .= $this->buildMenu('story', 'close', $params . "&from=&storyType=$story->type", $story, $type, '', '', 'iframe', true);
-                    if($execution->hasProduct) $menu .= $this->buildMenu('projectstory', 'unlinkStory', "projectID={$this->session->project}&$params", $story, $type, 'unlink', 'hiddenwin', 'showinonlybody');
+                    if(!empty($execution) and $execution->hasProduct) $menu .= $this->buildMenu('projectstory', 'unlinkStory', "projectID={$this->session->project}&$params", $story, $type, 'unlink', 'hiddenwin', 'showinonlybody');
                 }
 
                 if($this->app->tab == 'product' and $storyType == 'story')