I've been trying to expand my colony for this one planet, but some issues have come up. I can place Colony Deeds inside houses that I build on regular land, and they spawn NPCs with no problems. However, after leveling an entire mountain to bridge the gap for new flat land, I tried building a guard tower and placing a deed, but the game stopped working after placing it. The requirements for an NPC to move in are met, but the game just crashes, and when I re-enter, my deed is gone. Is there any way I can fix this?