The SKU is a variation Parent in one or more marketplaces and a variation Child in another marketplace(s)

The SKU [ fancy-pants] is a variation Parent in one or more marketplaces and a variation Child in another marketplace(s). A SKU needs to have the same Parentage in all marketplaces. Please resubmit the SKU with the correct 'Parentage' to ensure it is consistent across all marketplaces. You can read more about Parent/Child relationships at: http://sellercentral.amazon.com/gp/help/8841

This error might appear when you sell the same product on multiple Amazon marketplaces. To fix this error, make sure that your products have unique SKUs in terms of your Seller account.