It will appear to be validated but it's not, you already removed the URL from your license page and it should be enough. But, you can still revoke it if you prefer it that way.
Just assign your new URL and validate it there, please ignore that site, it will not get any updates anymore
BUT, I checked your license page and that URL is still assigned to it, it's not removed as you said. Please remove it and revalidate another site.