Complete delivery is required for purchase order &1

What causes this issue?

The confirmation of purchase order &V1& does not contain the complete
delivery indicator. However, this purchase order requires complete
delivery.

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?

Contact your supplier with regard to the complete delivery of purchase
order &V1&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.