Some understandable confusion. The backstory is, we created that old key on a server long ago. And forgot about it. Recently we wanted to be more active on Nostr so we create a new key. By the time we remember about the old key we already had a bunch of content on the new key.

So, follow => nostr:npub12ctjk5lhxp6sks8x83gpk9sx3hvk5fz70uz4ze6uplkfs9lwjmsq2rc5ky

Nostr doesn't have key revocation yet. So two important thing, first is we will probably see a lot of keys being lost and recycled with new ones. Second is, for security projects, I don't advise using the posted links to download firmware. Type yourself on the browser (that's true even if we had key revocation or were on other platforms)

nostr:note1mxxcc9fefudm3xksd00aq2g3g75zgcutncgtne6kjrxwctxvrn2shxw3v9