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 ('15afc4d5da436fa428d8c76ad310ca96', -1, 1713558749, 1713558749, '340e7e4a', -4, 0, 0)

Line : 187
File : sessions.php