ERROR: Query error occured.

SQL: SELECT e.sid FROM t_event AS e LEFT JOIN m_prefecture AS p ON e.prefecture_sid = p.sid LEFT JOIN m_area AS a ON e.area_sid = a.sid LEFT JOIN m_member AS m ON e.member_sid = m.sid WHERE (e.delete_flg != 1 OR e.delete_flg IS NULL) AND (e.valid_flg = 1 OR e.valid_flg IS NULL) AND (a.delete_flg != 1 OR a.delete_flg IS NULL) AND (a.valid_flg = 1 OR a.valid_flg IS NULL) AND e.member_sid = GROUP BY e.sid