Archive, hide or delete workflows

There are lots of workflows that the organisation no longer use but because you can still see them all, it's causing confusion and people select the old unused workflow incorreclty.

When I try to delete these, it comes up with the attached error message.

We are not using some workflows anymore - (we used to, but no longer) - how can we hide, archive, mark as inactive or delete workflows so that it's clearer which workflows should be used by the team when selecting a workflow when creating a requisition or in the process designer menu

https://peoplescouthelp.zendesk.com/agent/tickets/21609