Couldn't hydrate. Found non-unique key mapping named 'lang'

For the following query

return $this->createQuery('a')
->innerJoin('a.Translation t WITH t.lang = ?', $lang)
->innerJoin('a.UserAttributes ua')
->innerJoin('ua.AttrOptions o WITH o.attribute_id = a.id')
->innerJoin('o.Translation ot WITH ot.lang = ?', $lang)
->addWhere('ua.user_id = ?', $userId)
->addWhere('a.tab = ?', $tab)
->addOrderBy('a.ord asc')
->execute();

Unknown macro: {/quote}

i get

Couldn't hydrate. Found non-unique key mapping named 'lang'.

error, so i cannot join more than one translation table in one query because it cause error.