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 ('2798981dae07fb6c0fccafcfc310f3bf', -1, 1409692405, 1409692405, '36cd6347', 1, 0, 0)

Line : 189
File : sessions.php