Maintain only one include indicator

What causes this issue?

You tried to set the "inclusion" indicator for this exclusion/inclusion
indicator to control at least two declaration types.
The system would select and declare documents marked this way for these
declaration types.

How can this happen?

Check if it is really possible for documents to exist that are relevant
for different declaration types. This means that they would, for
example, have to be declared for both INTRASTAT and EXTRASTAT.

System Response

The system issues a warning.

How to fix this error?

Correct your entry as necessary.

Error message extract from SAP system. Copyright SAP SE.