phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './myphpbb/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 ('38ac7a40bf98e5f7ab6a9d20d9eb5eb7', -1, 1268217370, 1268217370, '266bbf63', 0, 0, 0)

Line : 172
File : sessions.php