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 ('a03e9e80d82a5eb769fabc67c80cf419', -1, 1474861008, 1474861008, '36a0f65f', -1, 0)

Line : 158
File : sessions.php