So I deleted some stairs and now there's a weird floating texture where the stairs were. The texture can't be interacted with. In the screenshots below, I deleted the old stairs with CTRL+click.
You can see the result and the strange texture.
This is a pre-built lot from the game, that I'm trying to modify. Raising the terrain will cover the textures, but levelling makes them re-appear. I've also tried selecting the floating things with moveobjects on, but that didn't help. Deleting the stairs with the sledgehammer makes no difference.
Has anyone encountered this?