Hi

I have imported a CSV file containing 5000 products, each with 4 different sales prices. I need to add an additional 2 sales prices to the CSV and re-import.

My first question is, is there a way to do this without first removing all of the products? When I try and import the new CSV over the top, it fails and says that the codes are already in use.

If it is the case that I must delete all products and re-import, is there any way to remove products that are in-use? Currently when I try to remove a product that has been included in an invoice, deletion fails saying that the product is in-use.

Thanks,
Wes