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 ('48dd5c8e6e72d2aeb1e9cb17112e0d4c', -1, 1714517725, 1714517725, '0391240a', -8, 0, 0)

Line : 187
File : sessions.php