Requête erronée: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') ORDER BY nom , prenom' at line 1

SELECT DISTINCT personnes.* FROM personnes, concerts, concerts_personnes, saisons WHERE personnes.est_publie='YES' AND concerts_personnes.personnes_id = AND concerts_personnes.concerts_id= AND saisons_id = AND saisons.est_publie = 'YES' AND concerts.est_publie = 'YES' AND IN (SELECT personnes_id FROM personnes_personnesgroupes WHERE personnesgroupes_id=) ORDER BY nom , prenom

#1 /srv/www/vhosts/ obj->_error()
#2 /srv/www/vhosts/ db->execQuery()
#3 /srv/www/vhosts/ include()