Multiple Lovelace instances

I am planning to make a new ui and would like to start all over with my Lovelace.

It’s there any way I can do this without killing my old Lovelace file?

During my dev time I want the old to work.

Copy your old lovelace.yaml file (or the contents of the raw editor if using the GUI) to somewhere safe. Paste it back if needed.

Im rather looking for a way of switching between 2 versions during development. Either by using folders or instances.

Is it possible?