I created a while back a location in the model called 1st Floor. it is part of location Inside. All Rooms on the first room are children of this 1st Floor location.
at some point in the upgrades the 1st floor location vanished. my bedroom location which is a Room still shows that it belongs to the 1st Floor location. when i click on the link to the direct parent group from the model it goes to a blank page.
To test this - I created another location called First Floor (incase it was the number causing the issue).
Now it works fine. First Floor which is a location in Inside now has the various rooms as children. unfortunately I cant delete the 1st floor location from it because it isnt there
Item names must not start with a number. If you have such an item in your configuration you’ll see a message about this in the log. You have to remove it (and probably create a new one). If the item was created via UI (“managed item”), you can use the “API Explorer” (in the Main UI / “Developer Tools”) to remove it.