How to delete ad placement in Placement dashboard?

I am using Unity’s monetization system and accidentally added a placement with the incorrect name which caused it to have the wrong placementID. I would just like to either be able to edit the placementID or just delete this placement and replace it with the correct name. Unfortunately I can’t seem to figure out how to delete a placement. If anyone could tell me how to delete it or edit the ID that would be fantastic.
Thank you.

Did you solve how to do it?

Sadly, it isn’t possible. You can only disable it: