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 ('6f5c53719f19c5f3d61d9b42d54f93f0', -1, 1411424219, 1411424219, '365a6e3c', 0, 0, 0)

Line : 189
File : sessions.php