Specify a product or a means of transport

What causes this issue?

In the transportation lane &V1&, no data exists for a product or a
means of transport. At least one entry must exist for each.

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?

Create the relevant data.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.