ERROR “swiftc failed with exit code 1” when converting to latest syntax

Question

I was trying to convert syntax of old Swift project to new one as per few suggestion on Stack Overflow I tried converting it through Edit > Convert > To latest Synta

Answer 1

In my case I copied a core data entity and only renamed the entity but not the class. So go to your xcdatamodel and select the enitity > rename also the class name