phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './forum_members/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) VALUES ('077333c1f36fb4dc86deb659b41656d2', -1, 1467431163, 1467431163, '36a2933d', -1, 0)

Line : 158
File : sessions.php