Erreur mySQL en BO sur certaines fiches clients (prestashop)

Bonjour,

j'ai une erreur lorsque je veux consulter les fiches de certains clients dans le BO de mon site en prestashop:
An exception occurred while executing 'SELECT a.`id_address`, a.`firstname`, a.`lastname`, a.`address1`, a.`address2`, a.`postcode`, a.`city`, a.`company`, a.`phone`, a.`phone_mobile`, cl.`name` as country_name FROM ps_address a LEFT JOIN ps_country c ON a.`id_country` = c.`id_country` LEFT JOIN ps_customer customer ON a.`id_customer` = customer.`id_customer` LEFT JOIN ps_country_lang cl ON c.`id_country` = cl.`id_country` AND cl.`id_lang` = ? WHERE (a.`id_customer` != 0) AND (a.`deleted` = 0) AND (customer.id_shop IN (?)) AND (a.`id_customer` = ?) ORDER BY id_address asc LIMIT 50' with params [1, 1, "13420"]: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

[Doctrine\DBAL\Exception\DriverException 0]

L'erreur n'est pas sur beaucoup de clients mais cela est gênant.