Why are there duplicate Apple Support pages with document prefix "HT"?

I often see these duplicate Apple Support documents, one of them with the last part of the url beginning with the prefix "HT", why?

Example:

support.apple.com/en-us/HT201236 (Published Date: May 20, 2024)

support.apple.com/en-us/102650 (Published Date: May 20, 2024)

these documents are exactly the same, and they differ in the numerical part of the name but most noticeable, the first has the prefix "HT".

As I said I see this a lot, often with the numerical part of the name being the same, too but only one of them having the prefix "HT".

The pages having the same content and publishing date suggests that the two urls actually point to the same document, but regardless, what is the point of publishing the same content under two different urls like this?

The reason I mind is that it's annoying when I sometimes save two bookmarks that later turns out to point to the same content.