First activate the recording of BW statistics for InfoCube &1

What causes this issue?

Could not propose aggregates for InfoCube &V1&, as you have not
activated the recording process for BW statistics (OLAP) when queries
are executed for this InfoCube &V1&.

System Response

Cannot add new, proposed aggregates.

How to fix this error?

Activate the recording of BW statistics (OLAP) for InfoCube &V1&.
To do this, choose <ZK>Tools</> -> <ZK>BW Statistics for InfoCubes</> in
the DataWarehousing Workbench. You arrive at the dialog box <ZK>BW
Statistics: Entry Mode</>.
Then execute at least one query.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.