diff --git a/db/update21.0.sql b/db/update21.0.sql
index d40fc79b6e..c4d2ed649a 100644
--- a/db/update21.0.sql
+++ b/db/update21.0.sql
@@ -39,6 +39,9 @@ REPLACE INTO `zt_lang` (`lang`, `module`, `section`, `key`, `value`, `system`, `
 ('zh-tw', 'custom', 'relationList', '3', '{\"relation\":\"\\u91cd\\u8907\",\"relativeRelation\":\"\\u91cd\\u8907\"}', '0', 'all'),
 ('zh-tw', 'custom', 'relationList', '4', '{\"relation\":\"\\u5f15\\u7528\",\"relativeRelation\":\"\\u88ab\\u5f15\\u7528\"}', '0', 'all');
 
+INSERT INTO `zt_cron` (`m`, `h`, `dom`, `mon`, `dow`, `command`, `remark`, `type`, `buildin`, `status`) VALUES
+('0', '2', '*', '*', '*', 'moduleName=upgrade&methodName=ajaxProcessObjectRelation', '更新关联关系', 'zentao', 1, 'normal');
+
 UPDATE `zt_action` SET `action` = 'canceled' WHERE `objectType` = 'deploy' AND `action` = 'activated';
 
 DROP TABLE IF EXISTS `zt_account`;
diff --git a/module/upgrade/config/upgradeflow.php b/module/upgrade/config/upgradeflow.php
index 2bac694c09..fcb21144d1 100644
--- a/module/upgrade/config/upgradeflow.php
+++ b/module/upgrade/config/upgradeflow.php
@@ -137,7 +137,6 @@ if($config->edition != 'open')
     $config->upgrade->execFlow['18_3']['functions']      .= ',processDataset,processChart,processReport,processDashboard';
     $config->upgrade->execFlow['18_4_beta1']['functions'] = 'processDeployStepAction,updateBISQL,updatePivotStage';
     $config->upgrade->execFlow['20_4']['functions']      .= ',updateTaskRelationPriv';
-    $config->upgrade->execFlow['21_0']                    = array('functions' => 'processObjectRelation');
 }
 
 if(in_array($this->config->edition, array('max', 'ipd'))) $config->upgrade->execFlow['18_7']['functions'] = 'processOldMetrics,processHistoryDataForMetric,metric-updateMetricDate';
diff --git a/module/upgrade/control.php b/module/upgrade/control.php
index bc26e141d4..8ef7782406 100644
--- a/module/upgrade/control.php
+++ b/module/upgrade/control.php
@@ -820,4 +820,17 @@ class upgrade extends control
         $check = $this->loadModel('bi')->checkDuckdbInstall();
         echo(json_encode($check));
     }
+
+
+    /**
+     * 定时任务：处理内置关联关系。
+     * AJAX: Process object relation.
+     *
+     * @access public
+     * @return void
+     */
+    public function ajaxProcessObjectRelation()
+    {
+        $this->upgrade->processObjectRelation();
+    }
 }
diff --git a/module/upgrade/model.php b/module/upgrade/model.php
index 299b49229f..a1b842ae0c 100644
--- a/module/upgrade/model.php
+++ b/module/upgrade/model.php
@@ -10083,6 +10083,8 @@ class upgradeModel extends model
      */
     public function processObjectRelation()
     {
+        if($this->config->edition == 'open') return true;
+
         /* Process story link story. */
         $linkedtoStories = $this->dao->select('*')->from(TABLE_RELATION)
             ->where('AType')->in('story,requirement,epic')
@@ -10392,6 +10394,15 @@ class upgradeModel extends model
             $relation->BID      = $childDemandID;
             $this->dao->replace(TABLE_RELATION)->data($relation)->exec();
         }
+
+        if(!dao::isError())
+        {
+            $this->dao->delete()->from(TABLE_CRON)
+                ->where('`command`')->eq('moduleName=upgrade&methodName=ajaxProcessObjectRelation')
+                ->andWhere('type')->eq('zentao')
+                ->andWhere('status')->eq('normal')
+                ->exec();
+        }
         return true;
     }