Problem z modern aac, mysql

[fracek91]

Siema, od razu zaznaczam, ze znalazlem ten temat: http://otland.net/f28/modern-aac-i-mysql-116166/ i zmienilem w mysql to co ktos tam podal, ale to nic nie zmienilo, no chyba, ze trzeba cos zrestartowac (resetowalem apache i nic nie dalo).
tresc bledu:

A Database Error Occurred

Error Number: 1140

Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause

SELECT p.id, p.question, GROUP_CONCAT(a.answer SEPARATOR ';') AS answers, GROUP_CONCAT(a.id SEPARATOR ';') AS answers_id FROM poll p JOIN poll_answer a ON p.id = a.poll_id WHERE p.status = 1 AND date_start <= NOW() AND date_end >= NOW()

Prosze o pomoc