SAP Message BC218 - Adding an entry with this key is not allowed

Diagnosis
When adding an entry, you have specified a key that is not valid forthis table.
In the case of a software upgrade, it is difficult to differentiatebetween old data and new data with initial content. Therefore, such anentry is not permitted.

System Response
The entry cannot be added.

Procedure
Specify a different key or remove the entry with the function Skip
.