This invoice has already been passed to Coupa by the supplier. Each invoice a supplier passes to Coupa must be unique, so the invoice is being marked as a duplicate.
How do I fix this?
There isn't really anything that you have to do. But if you want to make sure that the invoice has already been passed to Coupa from the supplier, in Coupa search for the invoice using the invoice #.
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE cXML SYSTEM "http://xml.cxml.org/schemas/cXML/1.2.020/cXML.dtd"> <cXML xml:lang="en-US" timestamp="2015-03-01T16:03:51+00:00" payloadID="20150301 160344.345"> <Response> <Status text="Expectation Failed" code="417">Invalid attributes in document. [Validation failed: Invoice # has already been used for this supplier Invoice header: Invoice # has already been used for this supplier]</Status> </Response> </cXML>