Oh boy, you have corrupted memories and relationships and both hoods. Done exactly what others posted here to never do. Never delete a Sim (even in the bin in game) and never move Sims from one main hood to another. With that said, how to reset the hoods (and start all over) is to pull either the neighboorhood file from the EA game folder, restart the game and it will recreate it, fresh copy found in the program files.
Or remove the entire EA game folder if you want to start over in all hoods etc.
If you want to try to salvage this but I highly advise let it go and start over in fresh EA game folder/with fresh regenerated hoods.
Here are the beginner instructions to SimPe. There are more complicated instructions as you learn to use SimPE but these are the basics.
https://simpeforum.ambertation.de/viewtopic.php?t=30
Basics of TS2: The hoods included in the game are Main Hoods, never move Sims in and out of these main hoods to other hoods. The only hoods your Sims can move to are subhoods attached to your main hood. And never delete subhoods if your Sims met and know any subhood Maxis Sims who live in those subhoods.
