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 ('aa6a5984084fcb3535ddbea5de35d220', -1, 1368985520, 1368985520, '1716d49e', 1, 0, 0)

Line : 189
File : sessions.php