Incorrect index class used in index series &1

What causes this issue?

Only index classes 1 to 4 are allowed for Asset Accounting.
Real estate management can use index classes 5 and 6.
However, index series &V1& uses index class &V2&.

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?

Correct the index class of index series &V1&.

Error message extract from SAP system. Copyright SAP SE.