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 ('b048d17700a4b37dc28a61ee73b417db', -1, 1713769699, 1713769699, '2cc81bd7', -8, 0, 0)

Line : 187
File : sessions.php