This means that the supplier name extracted from an invoice is not paired with any Xero contact. 

Pairing needs to be done so that Datamolino remembers how to pair your supplier names with contacts in Xero. We do not want to create new supplier contacts in Xero without your consent. 

To fix this, please click on the 'Contact' field and either choose one from the list (you can type here) or create a new contact. Once you pair a contact with a supplier name, we remember your selection.