@danirose2143, worlds revert to their original state when you make a new save game start. That's why I've only started a new game a grand total of 2 times since the game first came out. I spend far too much time renovating all the worlds to just throw all that effort out. If I want to start a "new sim household" I do it in my existing game, so I at least can keep the worlds and lots that I have set up.
My current game, for example, started just as a standard "legacy" challenge type game. But I have added new households to it, starting a few scenarios in it, and now play it as a rotational game.