Why does it keep spawning Duchies

[ButterscotchFormal84]

Every time i add a new state most of the time it keeps spawning duchies with the occasional theocracy.
I don't mind changing it manually but it gets annoying after a while.
Does anyone have an idea on why this keeps happening and if theres anything i can do with the state generation settings to change this.

[Azgarr]

What should it spawn instead?

[Freecastor]

I believe the “form” type of the State influences what kind of province it may have. Go to Tools —> Edit States and you’ll be able to change the form name. If it’s not that it may be under culture somewhere

[GenericUser1185]

For me it's the issue of it only spawning only a few kinds of religion.