Help with exporting scenes

Godot 4

Currently it creates a the unit1 scene in the world scene but then it says unit 1 already has world scene as parent. I want it to create another unit one when I click again. What do I need to change to get that

There were 2 images but new users impeded image bull

can you post a screenshot of the scene tree? Is there a different script using this unit1 variable?