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 ('d768d59b13de9a6e3b056ab33286267e', -1, 1462028564, 1462028564, '3690707f', 22, 0)

Line : 158
File : sessions.php