phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './forum_43/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 ('0d76d0341f21ed76a36b579b5fcd7531', -1, 1464724029, 1464724029, '3651814f', -1, 0, 0)

Line : 187
File : sessions.php