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 ('259a2b9d48ce874c48a43848b8b0a761', -1, 1487793624, 1487793624, '36c59c40', 0, 0, 0)

Line : 187
File : sessions.php