The names of the enhancements must be different.

What causes this issue?

You must specify two names for the enhancement type "Insert before and
after the original document" . These names must be different.

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?

Enter two different names for the enhancements.

Error message extract from SAP system. Copyright SAP SE.