phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './forum/phpbb2_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7ffb1a1fa79f0828b5152e8e3440f355', -1, 1411271819, 1411271819, '36595ca1', 8, 0, 0)

Line : 373
File : sessions.php