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 ('bc99e15fbda119b707bfd9ae86b581c4', -1, 1488070568, 1488070568, '3691d594', -1, 0)

Line : 158
File : sessions.php