I accidentally placed an outdoor floor tile inside, and it won't let me undo it. It created a glitched out section of the floor with a white outline. Unfortunately for me, I did this on Wailon Lodge, which means I can't edit the architecture of the building to actually see the outdoor tile under the building. Erasing the outdoor tile doesn't work, placing more outdoor tiles makes it worse, and placing indoor tiles over it doesn't do anything.