It is possible to link an existing world to a different scene template after the world has been created or after a linked scene is deleted from the world. This can be used to easily update, back up, or completely change the content of a world without breaking existing links to the world or needing to publish a new world.
Select the world that you want to link a scene to.
Click More Options for that world, which opens a popup menu.
In the popup menu, choose Link to another scene.
Select Link to another scene.
This opens a dialog where you can link your world to a new scene template. From the dropdown menu, choose a new scene template or choose 'no scene' if you want to unlink the current scene from the world.