&4 Enter a unique identification for this scenario set

What causes this issue?

There is already another scenario set with the same identification. Each
scenario set must have a unique identification.

System Response

The system has not saved this scenario set.

How to fix this error?

Change the identification of this scenario set.

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.