phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './messageboard/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 ('5ba0566405f5434ee6cf0d614dcc2552', -1, 1435778747, 1435778747, '3651112b', 1, 0, 0)

Line : 187
File : sessions.php