Subquery in doctrine2 notIN Function

The same alias cannot be defined 2 times in the same query

$qb  = $this->_em->createQueryBuilder();
$qb2 = $qb;
$qb2->select('m.id')
    ->from('Custom\Entity\MembreService', 'ms')
    ->leftJoin('ms.membre', 'm')
    ->where('ms.id != ?1');

$qb  = $this->_em->createQueryBuilder();
$qb->select('mm')
    ->from('Custom\Entity\Membre', 'mm')
    ->where($qb->expr()->notIn('mm.id', $qb2->getDQL())
);
$qb->setParameter(1, $service);
$query  = $qb->getQuery();

return $query->getResult();

Ideally you should use many-to-many relation for your entity, in this case your query is going to be much simpler.

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