phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './forum_members/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('c07ff0491082db522fb8971299e7d015', -1, 1430159662, 1430159662, '36a1956b', 21, 0)

Line : 158
File : sessions.php