Undeletable Dojo Decoration

[Cerasasori]

Back when the new dojo effects were first introduced, I opted to testing a number of them within one of my dojo's rooms. In the process, One of the yellow placeholders got locked in place and cannot be deleted. no matter what angle it's approached from.

I've tried reloading the dojo, hitting it from different angles, and rebooting the game, but nothing seems to work. The only thing I haven't tried is deleting the room, as doing so would require deleting nearly all of the dojo; being that the room in question is a parent to nearly a couple dozen rooms. Below are a few screens of the said decoration. More information can be provided if it's required