Doing a query on https://parabolagnulinux.org/packages/differences/ with an unrecognized architecture currently returns a generic HTTP 500 error page. It should return a 4XX range error (either 404 or 410... perhaps 404, but I'd think abou it), along with a message saying what's up.

I say this because GoogleBot, and occaisionally random other users, periodically try to load a comparision of i586 & i686; i586 having been deleted.