&1 entered as most granular time characteristic but &2 is correct

What causes this issue?

Time characteristic &V1& is currently specified as the most detailed
reference characteristic for the non-cumulative key figures in the
InfoCube. However, from the list of time characteristics, &V2& was
identified as the most detailed time characteristic.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You cannot make corrections in the current mode.
If you switch to change mode for the InfoCube, you can change the
reference characteristic to &V2&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.