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 ('61f1468736dc953c4ba4f9f526d1143e', -1, 1383544757, 1383544757, 'ccece2d2', -9, 0, 0)

Line : 189
File : sessions.php