Invalid OrderItemID or AmazonOrderItemCode.
This error occurs when you specify an unknown OrderItemID (order-item-ID) in your shipping confirmation file, adjustments file, shipping confirmation feed or adjustments feed. Common reasons why this might be the case include the following:
To resolve this error, please resubmit your data using the OrderItemID value originally supplied in the orders report.
If you are using tab-delimited text files to manage your orders, Microsoft Excel may have reformatted your OrderItemID when you entered it in your template. To prevent Microsoft Excel from reformatting your data: