phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './tripleac_Forum/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('17555f947c16fbd96973a3c0fe6cc1ae', -1, 1413857351, 1413857351, '36a7abba', -1, 0, 0)

Line : 187
File : sessions.php