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 ('09c49ecfbd5b67e1b0f414fdbc7fc478', -1, 1472342862, 1472342862, '36509e43', 0, 0, 0)

Line : 187
File : sessions.php