phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb/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 ('88fb875c5f597c9574b3a56dcb1bd886', -1, 1406557314, 1406557314, '36c682cb', 10003, 0, 0)

Line : 189
File : sessions.php