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 ('411f0e11e85aecb35cd73ce44a95ce5b', -1, 1418990141, 1418990141, '3691d12a', 8, 0, 0)

Line : 187
File : sessions.php