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 ('d874f35cb02efa6ae3d18a44440f1c41', -1, 1714062779, 1714062779, '12bcfc17', -6, 0, 0)

Line : 187
File : sessions.php