Are you sure you are NOT using the Fandom Wikia? That one has been abandonded and has fallen prey to trolls. If you are (still) using the Fandom Wikia, that kind of stuff can happen.The RS Wiki needs a hand, and Bwian's will gladly take the rest of your body!
In the beginning the Universe was created.
This has made a lot of people very angry and been widely regarded as a bad move.
The Wiki you're referring to is the Fandom Wiki, which isn't endorsed by Jagex.
This is the URL to the Jagex-endorsed wiki, which is not the Fandom/Wikia site: https://oldschool.runescape.wiki/
The Fandom wiki has wikia or fandom in the url. Somebody has been going through and editing every page to redirect to the Nieve page on the Fandom wiki. In fact, they still seem to be doing it as I type this.
Rest assured though the Jagex-endorsed Wiki is working as per usual.