we use the XML version of the Trading API. A colleague of mine created some Items manually (i.E. not over the API). Whenever we attempt to update those items with "ReviseFixedPriceItem", we get the error 21916270: "No Matching SKU", and a copy of the item is created instead of updating the already existing item. Funnily enough the original item appears with the SKU we use when updating when we do a "GetSellerListRequest" call. I suspect that the items my colleague created are somehow forbidden of being updated via "ReviseFixedPriceItem", or that the SKU of those items is not being "searched", and thus we get the "No Matching SKU"-Error. Is there any way of confirming this, and, if this is the case, allowing those items to be also updated via "ReviseFixedPriceItem" and SKU? Or do you think something completely different is the issue here?