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 ('591479e72c1b7d1d8f7091f362fa6dc8', -1, 1268427262, 1268427262, '266bbf60', 0, 0, 0)

Line : 172
File : sessions.php