Delete container image button absent

I am trying to delete an image out of my container registry - in fact it’s the only image in there. However, when I go to delete it, the button is absent.

I opened up both my usual vivaldi and firefox later on in private browsing with all of my addons disabled, logged in, and the delete button is still absent. Is there some condition that won’t let me delete images?

The project was archived. After unarchiving it, I was able to delete the image.