[Sword & Shield] I catched Deino on Pokémon Shield?!

I recently started playing Pokémon again, on my Pokémon Shield edition wich I got last year. Today I looked through the differences between Sword and Shield, and I realized on Shield you cannot catch Deino. But I caught one in a raid and I still have it, and it seems to be alright.
It has me listed as its og trainer including my trainer ID. (I don't have Nintendo Online so I couldn't have traded it, not even by accident. It really appeared in a raid and I just caught it.)
Has anyone ever experienced something like that? I have no idea how that happened, and I found nothing on the internet about it. It just says everywhere that it's not included in shield. Can anyone explain how this happened?
I am not trolling, can also provide photos if you don't believe me.

When did you catch it? Sees a Max Raid event from October 1, 2020 to October 23, 2020 with Deino. Appears in both Sword and Shield. Retains Max Raid events until you reconnect to the Internet in-game (including non-Switch Online activities like Mystery Gift).

Oh yeah i Guess that's it… so it's quite normal. thanks a lot!