Constant keep simulation changes?

I appear to have set the editor to always keep all simulation changes and now I have no idea how to reset it as I have no idea how I even set it in the first place, but it is making testing nearly impossible and far more frustrating than it should be as npcs spawn in huge stacks if they’re not cleared between play tests and this breaks references that are for some reason persistent. Is there any way to disable this? Please? Its pushing me to the brink of insanity.

is that possible !, how did you kept simulation changes !!!
I need to do that