From ce6da7784bbed23d8f32227bd2b727a36b55550a Mon Sep 17 00:00:00 2001
From: zhouxin <zhouxin@easycorp.ltd>
Date: Mon, 28 Mar 2022 05:58:42 +0000
Subject: [PATCH] * Fix bug #21221.

---
 module/execution/model.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/module/execution/model.php b/module/execution/model.php
index 408ba1b30c..e7743f39a8 100644
--- a/module/execution/model.php
+++ b/module/execution/model.php
@@ -671,12 +671,12 @@ class executionModel extends model
             $projectID    = isset($execution->project) ? $execution->project : $oldExecution->project;
             $project      = $this->project->getByID($projectID);
 
-            if($execution->begin < $project->begin)
+            if($project  and $execution->begin < $project->begin)
             {
                 dao::$errors['begin'] = sprintf($this->lang->execution->errorLetterProject, $project->begin);
                 return false;
             }
-            if($execution->end > $project->end)
+            if($project and $execution->end > $project->end)
             {
                 dao::$errors['end'] = sprintf($this->lang->execution->errorGreaterProject, $project->end);
                 return false;