phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './teatral/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f9fc13a76f4220d3afa52d4b9e80c790', -1, 1419298225, 1419298225, '3693f876', 62, 0, 0)

Line : 187
File : sessions.php