using ancientwarfare-1.12.2-2.7.0.704.jar end minecraft 1.12.2
title says most of it AI in world generated builings dont stawn it just spawns a inviselble block with the name of the mod needed to spawn
end ps. the generated building spawn a bit mutch aswell

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The NPCs will spawn if you approach in survival mode, but not in creative mode. No, there is no way to disable this.