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 ('bc9e8b47fbda9b9d591b523687401ffb', -1, 1754887184, 1754887184, 'd849d88f', 2, 0, 0)

Line : 189
File : sessions.php