Invoice document &/& not complete on database

What causes this issue?

You want to process invoice document number &V1& in document year &V2&.
Unfortunately this document is not complete on the database. Access to
database table &V3& produced an error.
It would not make sense for you to process this document.

System Response

The system refuses to retrieve the document for processing.

How to fix this error?

INCLUDE ISR_SYSTEMFEHLER

Error message extract from SAP system. Copyright SAP SE.