When a price list is de-activated, all the contacts that had that list assigned automatically just stop having an active list assigned. Now I need to go contact by contact by contact re assigning the new list... so that I don't need to do it every time that contact makes a purchase.

My solution:
If a new price list is created and the old one is deactivated, the system should ask something like: "do you want to re assign a specific list to all customers who had assigned this list you're about to disable"?.

Thanks
bye!