functionId &1 does not exist &2

What causes this issue?

Ranking function &V1& does not exist.

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?

Check for typographical errors and correct, or remove the ranking
function from the list.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.