The 'Document pricing procedure' field is blank for control of &

What causes this issue?

You did not enter a document pricing procedure to control incomplete
Foreign Trade data on &V1&.
The prerequisite for detailed control of incomplete Foreign Trade data
on &V1& is that you maintain a document pricing procedure.
If you do not maintain this procedure, the general control of
incomplete Foreign Trade data from the "Foreign Trade Data: Control
System Behaviour' object applies to &V2& "&V3".

System Response

The system issues a warning.

How to fix this error?

Correct your entry only if you want to use a control other than the
general control of incomplete Foreign Trade data for &V2& "V3".

Error message extract from SAP system. Copyright SAP SE.