You kill a 150 quality beaver in a lodge and you don't butcher it, because it cannot be.
I really hope it's a bug and you will fix it and we craft a nice beaver cap, we opened another door hoping new spawned ones will give us our quality hides, but they still can't be butchered. And another. And another door.
People die in those lodges really often, it's just not worth to risk if you cannot even gather some materials from the dead bodies of those cute beavers.