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 ('d8ae24e8fe61db4baecf0c6067f37b07', -1, 1411228784, 1411228784, '36a64109', -1, 0, 0)

Line : 187
File : sessions.php