Choose a reference characteristic for InfoCube non-cumulative values

What causes this issue?

You chose non-cumulative values in the InfoCube.
For a non-cumulative value, it is required that a mutual reference
characteristic for time aggregation be determined, that defines the
granularity (degree of detail), in which the non-cumulative values are
managed. This (time) reference characteristic is valid for <zh>all</>
non-cumulative values of the InfoCube and must, therefore, be the
"smallest" time characteristic in the InfoCube, in which the
non-cumulative values can be managed.


Examples
The InfoCube contains warehouse non-cumulative values as well as the
time characteristics 'calender month' and 'calender year'.
In this case, define the InfoObject calendar month (0CALMONTH) as a
reference characteristic for the time-based aggregation.
The InfoCube contains warehouse non-cumulative values as well as the
time characteristics 'calender week' and 'calender month'.
Here you must firstly include the time characteristic 'calender day' in
the InfoCube, since 'calender week' is not the "smallest" unit of
'calender month'. Then define the InfoObject 'calender day' (0CALDAY)
as a reference characteristic for the time-based aggregation.

Error message extract from SAP system. Copyright SAP SE.