I’ve never read those words like purana kamma or nava kamma in the suttas before. (If you don’t mind, could you give me a Tipitaka reference for those words?)
Lal’s answer gave me a lot of things, which are completely different from the previous understanding I had of citta vithi. So before I ask some questions about them, I think we need a process to update information to make things go smoothly. I’m writing it. I think it will be quite long. Please excuse me for keeping you waiting.