For country of plant &, no entry maintained in object '& &'

What causes this issue?

For this country of plant, no entry has been maintained in the
completeness check for INTRASTAT data.
Since these entries control whether a field is a required field or not,
the system cannot carry out a field selection.
In addition, you cannot create an INTRASTAT declaration for this
country as long as these entries are missing.

System Response

The transaction is terminated.

How to fix this error?

Maintain the entries in table T609I accordingly using the activity
<DS:TRAN.OVE9>Declarations to Authorities: Control/Incompleteness</>.

Error message extract from SAP system. Copyright SAP SE.