Can't place my structure anymore?

So the other day I went to update my trading mod and I suddenly can’t place my trading station anymore? The only thing I did was added more items to trade in it’s inventory blueprint, I didn’t touch the structure blueprint. If I set the ‘structure to build’ to any vanilla structure I can place it, but even if I copy any vanilla structure to my mod folder and add it to the ‘additional structures’, it stops working. It seems like I can only use vanilla structures that aren’t in my mod’s folder.