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 ('f5df0bb8439d0d1b1cfab6766a57e881', -1, 1722053430, 1722053430, '03858246', -6, 0, 0)

Line : 172
File : /home/rebkell/public_html/boards/includes/sessions.php