I'm trying to do the Vim and Vigour" quest, got to the point where Jake tells me to go to a settlement and meet him there. Gives me new plot types and tells me to build one. Except I had already built a city plan there so the game will let me build precisely nothing. So I delete the city plan and all of the plot, objects, etc. Game won't let me build anything. Stand there waiting for 10 minutes while the game does it's thing. Game still won't let me build anything. Stand there waiting for an hour. Game still won't let me build anything. How do I get around this?