SAP Message R9158 - InfoObject "&1" must be unique throughout structure "&2"

Diagnosis
InfoObject "&V1&" contains the setting that it must be uniquelydetermined in all structure elements for structure "&V2&". However,structure "&V2&" contains structure elements that do not containInfoObject "&V1&" with a unique filter.
Note: If a variable was used in the restriction, this variable musthave the type "Single Value" in order to meet this condition.

System Response
The error is reported during the check.

Procedure
Insert a unique selection for InfoObject "&V1&" into each structureelement, or delete the InfoObject from all structure elements andinsert the InfoObjects into the filter with a unique selection.