Creation of titles for recreation of existing properties?

I just saw this on the IMDb, the Doctor Who story "The Abominable Snowman" as its own entry: https://www.imdb.com/title/tt21397968/reference/

Originally, of course, part of https://www.imdb.com/title/tt0056751/reference/

A lot of the 1960s episodes of the show were wiped by the BBC, and only exist in soundtrack form. To make some £££ they've started animating the soundtracks. So it's not a "new" show per se, it's just (quite poor) animation over the original audio.

Surely that should just go in "alternate versions" of the existing property? 

There doesn't appear to be a title for every animation yet, so it's not consistent, either.