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SKU <SKU>, Missing Attributes <STANDARD_PRODUCT_ID>. A standard product id (UPC, ISBN, EAN, etc.) is required for <SKU>; MISSING_KEYSET cannot be used. Feed ID: <FEEDID>.
For more details, see http://sellercentral.amazon.co.uk/gp/help/200692390
For certain products, Amazon requires a standard product ID (UPC, EAN, ISBN, etc.), and will not accept a MISSING_KEYSET reason. Please supply a valid standard product ID.