Collactables after returning from second layout to first layout

so in my game you can collect Things in a house. every room has a own layout. if you collact one Thing, it gets destroyed. but when i go in another room, the Thing will appeare again in the first room. than you can collect it twice. i want to avoide this. does anyone know what to do?

Fabi

Look at the 'Persist' behaviour, it's for this kind of thing where destroyed objects stay that way when you return to the layout.