phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_mw_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2cf352806d69bd3db11d94edb78040ff', -1, 1369280569, 1369280569, '6b15ba26', 31, 0, 0)

Line : 187
File : sessions.php