SAP Message UCMI035 - Doc.type &1: Invalid data stream type for validation method &2

Diagnosis
When assigning validation methods to document types, you are onlyallowed to use validation methods that have documents as the datastream type.
You assigned validation method &V2& to document type &V1&. However,validation method &V2& does not have the data stream type documents
.

Procedure
Check the assignment of the method to document type &V1&.