Enter a valid vendor

What causes this issue?

The vendor you have chosen, &v1&, using grouping key &v2&, does not
exist.

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?

Enter a different vendor or choose a different grouping key.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.