Before I go through the arduous task of reinstalling my uberhood, does anyone have any idea what may be causing this?

All of the neighborhoods I have attached as shopping districts (which is all of them with the exception of Belladonna Cove, the main hood), have this problem where none of the Sims have relationship ties to anyone outside of their immediate lot. In addition, all of them have bottomed-out aspiration levels. I’ve checked with my DL folder taken out, I’ve tried three different backups (going all the way back to 2016), and the problem persists. 

I checked my test hood and everything seems okay there. I was afraid to open Sycamore Cove to check but I believe that one would be fine, too, since the problem only seems to be affecting the shopping districts. 

The only thing I’d need to save are some of my lot makeovers – I’ve never really played my Uberhood so it wouldn’t be the worst thing in the world to reinstall it. But if anyone has any insight that could help me avoid a reinstall (or help me prevent this from happening again!) I’d appreciate it.