I get this error on apex.oracle.com: Internal Name must be unique.
I created a copy of the Content Row Template Component to make some adjustments. However, I cannot save the changes, as the copy got the same internal name as the original in the copy process, and I cannot change it anymore:
You can only change the internal name right after the copy action. However, most developers probably won't notice the same internal name until it's too late.
The copy process should create a new internal name, e.g. MY_CONTENT_ROW in this example.