If you need to change the SKU for your book to an ISBN, you will need to set up the title as a new title. You can purchase an ISBN from IngramSpark for $85 or supply your own ISBN during the title set up process. We furnish a barcode for the back cover at no cost.
You will also need to upload the cover and interior files. You can then have IngramSpark Support cancel the title with the SKU, if you wish.