I made a copy of my store to a different account and the new store cannot complete checkouts

[zachrealpro77]

I used the Shopify app "Rewind" to make a copy of my old store over to a completely new Shopify account. Since then I've had tons and tons of traffic to the new store but not very many add to carts and very few even attempts to complete checkout. I believe that either data was left out in the copying process over to the new store or new data was added to the copying process. Is every product on every store supposed to have its own Shopify product ID even if it's identical to another product on another store, from the same supplier and has the same color and size variation? With these have different product ID numbers inside of Shopify? Is it possible that during the copy process the old Shopify product ID numbers were retained instead of new ones being generated? Is it possible that at checkout there's a conflict created at checkout when somebody tries to buy product IDs that are associated with products from my old store instead of being a unique product ID unique to the new product at my new store? If this is an actual thing and it's identified as the problem, what's the fix for this? I've been driving thousands and thousands of dollars worth of traffic to my new store only to find out that I've got this check out extensibility issue on the checkout page plus also possibly some product ID number issues preventing checkouts. Anyone have any advice for those two issues?