phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO blitz_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2816ddf09bba47c5f2ac1c2a0df0a4c0', -1, 1713984851, 1713984851, '0aa8c802', -4, 0, 0)

Line : 200
File : sessions.php