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 ('2c9991c8c76951e4e234380fdfeced03', -1, 1432596298, 1432596298, '36574895', 29, 0)

Line : 158
File : sessions.php