i am working on a room and i need to make a lot of changes, but i don't want to change the URL for the final room, so i am using the "change scene" control, after i publish the scene in spoke i upload the url in the "change scene" inside my existing room. I notice that every time i change and upload the scene i have a double up of links assets, i have 4 link, when i upload the same scene i found 8 link in my room, a copy for every link, that means that after 5 changes i got 20 link, every link got 5 copies! How i can avoid that? Is that normal?