diff --git a/module/upgrade/model.php b/module/upgrade/model.php
index c0feb5c459..f558968679 100644
--- a/module/upgrade/model.php
+++ b/module/upgrade/model.php
@@ -596,6 +596,11 @@ class upgradeModel extends model
             $this->saveLogs('Execute 12_3_2');
             $this->execSQL($this->getUpgradeFile('12.3.2'));
             $this->appendExec('12_3_2');
+        case '12.3.3':
+            $this->saveLogs('Execute 12_3_3');
+            $this->execSQL($this->getUpgradeFile('12.3.3'));
+            $this->addPriv12_3_3();
+            $this->processImport2TaskBugs();//Code for task #7552
         }
 
         $this->deletePatch();
@@ -770,6 +775,7 @@ class upgradeModel extends model
             case '12_3':
             case '12_3_1':
             case '12_3_2': $confirmContent .= file_get_contents($this->getUpgradeFile('12.3.2'));
+            case '12_3_3': $confirmContent .= file_get_contents($this->getUpgradeFile('12.3.3'));
         }
         return str_replace('zt_', $this->config->db->prefix, $confirmContent);
     }
@@ -1564,6 +1570,34 @@ class upgradeModel extends model
         return true;
     }
 
+    /**
+     * Add priv for version 12.3.3
+     *
+     * @access public
+     * @return bool
+     */
+    public function addPriv12_3_3()
+    {
+        $this->saveLogs('Run Method ' . __FUNCTION__);
+        $privTable = $this->config->db->prefix . 'grouppriv';
+
+        $oldPriv = $this->dao->select('*')->from($privTable)
+            ->where('module')->eq('todo')
+            ->andWhere('method')->eq('edit')
+            ->fetchAll();
+        foreach($oldPriv as $item)
+        {
+            $this->dao->replace($privTable)
+                ->set('module')->eq('todo')
+                ->set('method')->eq('start')
+                ->set('`group`')->eq($item->group)
+                ->exec();
+            $this->saveLogs($this->dao->get());
+        }
+
+        return true;
+    }
+
     /**
      * Add priv for 8.2.
      *
@@ -1735,6 +1769,28 @@ class upgradeModel extends model
         return true;
     }
 
+    /**
+     * Process bugs which import to project tasks but canceled.
+     *
+     * @access public
+     * @return void
+     */
+    public function processImport2TaskBugs()
+    {
+        $this->saveLogs('Run Method ' . __FUNCTION__);
+        $bugs = $this->dao->select('t1.id')->from(TABLE_BUG)->alias('t1')
+            ->leftJoin(TABLE_TASK)->alias('t2')->on('t1.toTask = t2.id')
+            ->where('t1.toTask')->ne(0)
+            ->andWhere('t1.status')->eq('active')
+            ->andWhere('t2.canceledBy')->ne('')
+            ->fetchPairs();
+
+        $this->dao->update(TABLE_BUG)->set('toTask')->eq(0)->where('id')->in($bugs)->exec();
+        $this->saveLogs($this->dao->get());
+
+        return true;
+    }
+
     /**
      * Delete company field for the table of zt_config and zt_groupPriv.
      *