phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './aa_forum/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 ('299adc33e0bb29c63519c8ee88855f57', -1, 1280440356, 1280440356, '266bbf54', 155, 0, 0)

Line : 187
File : sessions.php