SAP Message RSRV012 - &1 (technical name &2) is a line item dimension

Description
The dimension &V1& with technical name &V2& is also known as a lineitem dimension: In this dimension, just one characteristic isaccepted. In the InfoCube maintenance (transaction RSDCUBE), thedimension is indicated as a line item. There are no dimensiontables for a line item dimension, but rather a view for the SIDtable for the characteristic in this dimension. In the fact table, theSIDs for the characteristic are used instead of the dimensionkey.
Therefore, the system checks all the s that occur in a facttable as well as in the SID table of the characteristic.