Attributes of key figure & must not be changed

What causes this issue?

Data for the planning area already exists. You are not allowed to
subsequently change the attributes of time series key figures.

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

System Response

How to fix this error?

If you wish to change the key figure attributes, you will first have to
delete all existing time series of this panning area
(de-initialization).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.