Inv. not automatically created, potential duplicate exists (acc doc & &)

What causes this issue?

The system has performed a check that prevents the creation of duplicate
invoices for invoices that are created automatically, for example using
BAPIs or SOA services.
The system has just tried to create an invoice which contains data that
is identical with data in the existing accounting document &V1& &V2&.
The following data is identical in both documents:
Company code
Document date
Reference
Currency
Supplier
Amount

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Compare the current invoice with the accounting document &V1& &V2&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.