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 ('95e18e00147981003feb37fc85ebd729', -1, 1422526543, 1422526543, '36578878', -7, 0)

Line : 158
File : sessions.php