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 ('6bffef4c82a7d4d8f4b1a1f9152686e9', -1, 1490590625, 1490590625, '36cc7a39', 1, 0, 0)

Line : 187
File : sessions.php