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

SELECT * FROM personnes WHERE id IN (SELECT personnes_id FROM concerts_personnes WHERE concerts_id = )


#1 /home/clients/44bea4aa146ad3aeec7a4a4aa226502e/web/cms/lib/db.php(38): obj->_error()
#2 /home/clients/44bea4aa146ad3aeec7a4a4aa226502e/web/obj/concerts.php(30): db->execQuery()
#3 /home/clients/44bea4aa146ad3aeec7a4a4aa226502e/web/index.php(66): concerts->__construct()