phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('cce5b7e501e2e218ed16dae04e0e4c8b', -1, 1714517873, 1714517873, '03951ab0', -8, 0, 0)

Line : 187
File : sessions.php