SAP Message AIS_STDREP075 - BM key figures & must be specified along with the assignment variant

Diagnosis
A benchmark key figure can be used in the layout only if you specify theassignment variant. Add the technical name of the benchmark key figure,along with the assignment variant, by using the input help, or enter itmanually in the following format:
name#n, where the name is the name of the benchmark key figure, and n isthe assignment variant.
Example: BMYLD#2
Benchmark key figure = BMYLD
Assignment variant = 2