id of ranking function must be specified

What causes this issue?

In @Consumption.ranking.activeFunctions, the id of the ranking function
must be specified by annotation 'id'.

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?

Add the 'id'-annotation per ranking function listed in the array.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.