I copied the following Device Tile piston:
Room Occupancy Status Tiles (xc0u)
And before making any changes, I saved it with the name Vacancy in a category named Unit Status.
However, while Unit Status shows that there is a piston in that category, the piston itself isn’t listed:
The piston is saved, because it shows up in the Move Piston(s) dialog:
How can I edit or delete this piston?