Adobe Portfolio: Can you redirect old URL to same website/new url?

So I'd like to change my Adobe Portfolio URL, which I understand is simple enough to do. However, I'd also like for the old URL to redirect to the same website/the new URL I want to use.

It's very unclear how to proceed and I'm wondering if anyone else has been able to do so. I am aware that you can use a custom domain to redirect to the portfolio but it appears to me you can do that but NOT with previous Adobe Portfolio URLs.

I really don't want to just remake my entire portfolio with the new domain name to solve this issue. If anyone has been able to do this, or if you need more clarity on my issue, please let me know, thank you!