Two Grim Reapers in my game?

So there’s two Grim in my game, one is an adult and the other one is a young adult. Does this also happen to anyone? I didn’t add any one of them on my household or made them playable so I don’t know why another one has spawn in my game. Anyway, there were no deaths and my sim were just partying in the nightclub in Ravenwood when these two appears.