@Frank I did this but something seems to have gone awry on the delete. I did the following:
1. Created a temporary prod stage.
2. Set the one I want to delete to be a staging stage.
3. Deleted the stage that was now staging
4. Created a new stage (with the same name as the one I’d just deleted) as a production stage, copying settings from an existing stage (untouched in this process)
5. When I click on the new prod stage entry it’s missing all the details I’d expect to be there
The screenshot is what I see: