Purchasing document & does not exist in system

What causes this issue?

Purchasing document &V1& no longer exists in the system, but is is
relevant for a condition record for rebate arrangement &V2&.

System Response

Purchasing document &V1& is not processed. The data created may
therefore be incomplete or incorrect.

How to fix this error?

If necessary, contact your system administrator.
Possible causes:

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

The document has already been archived
Hardware or software error
Internal program error (document not imported to internal buffer)
The condition record has (internal) number &V3&.

Error message extract from SAP system. Copyright SAP SE.