> 301: Used when a page has permanently moved to a new location. This is best for SEO because search engines will focus on ranking the targeted site instead of the original.

> 302: Used when a page is only temporarily moved. This is best if you intend to move the page back to its original URL in the future.

Seems like 302 is suitable here. I see some discussion here https://stackoverflow.com/questions/13203572/url-shortener-301-redirection-understanding