Deleting a collection that is tagged into a higher taxonomy

[crarugal]

This collection was created, but it is not possible to delete it.

It has no targets attached to it, but it is tagged into a higher level taxonomy:

This is the error message that pops up when attempting to delete it:

This message occurs because it is linked to the higher taxonomy; the difficulty is trying to unlink it, so that it can be deleted. Even after being unchecked, the save button remains greyed out:

When the button can be clicked:

When unlinked, the button's class is now disabled:

[crarugal]

The same Cost of Living collection set up was recreated in DEV: https://dev.webarchive.org.uk/act/collections/4109/edit

We can see it's tagged into Society and Communities:

When trying to delete it:

Successfully deletes, takes you to the Collection list view. It is removed as a sub-collection.

Collection also is removed permanently