SAP Message /SAPCND/CUSTOMIZING403 - Entry is in SAP name space.

Diagnosis
You have tried to make a new entry and used a key value that is not inthe name space that you manage. This can lead to problems with laterupgrades, as the entry made can be overwritten by an import or canitself overwrite an existing entry.

System Response
The entry is rejected or accepted as a modification.

Procedure
Check your entry and enter a key value from the name space that youmanage. You can see the name space definition with the program helpRDDKOR54.