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 ('298a6f103c8cae69c13f268de7b9ede1', -1, 1713507023, 1713507023, '03913c1d', -9, 0, 0)

Line : 187
File : sessions.php