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 ('213316d25c8e5a23117b02cf26e4976e', -1, 1397945157, 1397945157, '36d39968', -1, 0, 0)

Line : 187
File : sessions.php