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 ('f7be16fc8f68d3cf04b29c4b41dbba19', -1, 1495892594, 1495892594, '36c67666', 21, 0)

Line : 158
File : sessions.php