phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('aa1a7d3e6832f4b9f8a948282acf26ba', -1, 1713868784, 1713868784, '0390bb67', -8, 0, 0)

Line : 172
File : sessions.php