Rooms like harvest moon games

I’m having difficulty programming a system for loading the interiors of places like Harvest Moon does. I tried to instantiate levels but it causes problems because I always have to start the level and this instantiates blueprints that should have already been instantiated before. Is there any other way or should I use this one and create a scheme to avoid starting some things every time?

Do you mean level instances?

If you want them to be consistent with what has gone before, then you’ll probably need to use the save game to record any changes