How to set up redirects from an old page URL to a new page URL in Google Sites

I'm working on updating a bunch of Google Sites-hosted knowledge base entries.

Aside from content and formatting updates, I want to fix some of the URLs since many of them are absurdly long sentences rather than easy to read keywords. For instance:

sites.google.com/mysite/iamaskinghowtoredirectagooglesitespageafterrenamingit

instead of

sites.google.com/mysite/google-sites-redirect-renamed-url

It is very easy to change a page's URL in Google Sites, however, the old URL does not get redirected to the new. This seems like it'd be an easy thing for Google to accomplish, and yet…

Is there a way that I can make this happen on my end, or am I (and my users, and our search result positions) stuck with silly, unreadable URLs for eternity?

_{Edited to add that the reason the URLs were given this absurd format is due to an, I believe, ill-conceived understanding about SEO.}