Customizing Journal Entry Description

I've worked through Document ID 958394.1 "How to Get More Details On the Journal Entry Description For Create Accounting In Receivables".

When I create the user defined journal entry description, the instructions state to "query seeded Journal Description Code: INV_H", make changes and save it.  It doesn't say whether to save the code with the same name (INV_H) or a different name (for example, INV_H2).  I tried it both ways, and they both seem to work, but when I try to modify the Header Assignments on the Application Accounting Definitions screen, I can only see the one that I've saved with a different name (INV_H2). This makes me think that I should change the name, but I'd like a confirmation.  I'm