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 ('af7e7b04416596c0ca8f3da554f43d8a', -1, 1713600539, 1713600539, '0391c947', -8, 0, 0)

Line : 187
File : sessions.php