SAP Message R-354 - Complex classes must be unique

Diagnosis
Complex classes must be unique, that is, an existing TR class may onlyby extended once.
You attempted to create the complex class &V1& in an extended riskobject with the external number &V2&. Class &V1& already exists in theextended risk object with the external number &V3&.

System Response
The records contained in the blocks are not processed any further.