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 ('6d811d404b0ffb9e4cb222c0186a57e6', -1, 1411344492, 1411344492, '36eb33f3', -1, 0, 0)

Line : 187
File : sessions.php