如何在symfony3中使用queryBuilder更新两个连接表

Question

如何更新已连接的两个表的字段。 它显示错误。

  

消息＆＃34;：＆＃34; [语义错误]第0行，第271页附近＆＃39; a.artisanName＆＃39;：   错误：＆＃39; a＆＃39;未定义。＆＃34;，

    "class": "Doctrine\\ORM\\Query\\QueryException",  

 $query = $qb->update("MainBundle:ArtisanUser", 'au')
                ->join("au.Artisan", 'a')
                ->set('au.firstName', $qb->expr()->literal($parameter['params']['firstName']))
                ->set('au.lastName', $qb->expr()->literal($parameter['params']['lastName']))
                ->set('au.email', $qb->expr()->literal($parameter['params']['email']))
                ->set('au.dateOfBirth', $qb->expr()->literal($dob))
                ->set('au.gender', $qb->expr()->literal($parameter['params']['gender']))
                ->set('au.profilePicture', $qb->expr()->literal($parameter['params']['profilePicture']))
                ->set('au.userLang', $qb->expr()->literal($parameter['params']['userLang']))
                ->set('au.updatedAt', $qb->expr()->literal($updatedAt))
                ->set('au.updatedBy', $qb->expr()->literal($parameter['params']['artisanUserId']))
                ->set('a.artisanName',$qb->expr()->literal($parameter['params']['ArtisanName']))
                ->where('au.id = ?1')            
                ->setParameter(1, $parameter['params']['artisanUserId'])            
                ->getQuery();
            $data = $query->execute();