diff --git a/module/task/model.php b/module/task/model.php
index 08927d7543..780f3a6a55 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -935,7 +935,7 @@ class taskModel extends model
             foreach($teams as $member) $this->dao->insert(TABLE_TEAM)->data($member)->autoCheck()->exec();
 
             /* Assign the left hours to zero who will be skipped. */
-            $skipMembers = $this->loadModel('execution')->getTeamSkip($oldTask->team, $oldTask->assignedTo, $task->assignedTo);
+            $skipMembers = $this->loadModel('execution')->getTeamSkip($oldTask->team, $oldTask->assignedTo, isset($task->assignedTo) ? $task->assignedTo : $oldTask->assignedTo);
             foreach($skipMembers as $account => $team) $this->dao->update(TABLE_TEAM)->set('left')->eq(0)->where('root')->eq($taskID)->andWhere('type')->eq('task')->andWhere('account')->eq($account)->exec();
 
             $task = $this->computeHours4Multiple($oldTask, $task, array(), $autoStatus = false);