SAP Message 88531 - For recycling partner &1 imports must also be settled

Diagnosis
The system found data records for imports. They can not be settled with
this document of recycling partner &V1&.

System Response
The declaration continues to run, but settlement is not complete.

Procedure
Settle the import transactions for recycling partner &V1& in company
code &V2& also, or check the settings for the data filters in REA
Customizing.