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 ('23d8140968f08ad6a98d8862dded24a7', -1, 1713938391, 1713938391, '2cc81bd7', -4, 0, 0)

Line : 187
File : sessions.php