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 ('6171e4d11b6c6817ec3a7b0c8c463030', -1, 1713572442, 1713572442, '0395f320', -4, 0, 0)

Line : 187
File : sessions.php