Adding inbound delivery &1 to shipment with missing inb. dly. failed

What causes this issue?

There are references to missing inbound deliveries in shipments that
fit the combination vendor - delivery note number for inbound delivery
&V1&. The system attempted to save the inbound delivery to these
shipments. This was not successful.

System Response

The inbound deliveries were not saved to the shipments.

How to fix this error?

Find the appropriate references in Goods Receipt Automotive and save
them to the inbound delivery manually.
You can find the references by making entries in the vendor and
delivery note fields in the Goods Receipt Automotive search.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.