Entering Credit Memo Reason on Projects Credit Memo Invoice

Hi,

We are using Oracle R12.1.3.

When I raise a Projects Credit Memo Invoice, it is not possible to choose a Credit Memo Reason - as you can see on the screenshot below. This happens for invoices created via an Event on Event/Event Projects, and invoices created via an associated cost (e.g. AP Invoice) on a Work/Work Project.

In fact, everything on the form is read-only except the info on the Comment tab.

Is this normal? Is there any way for users to be able to select a Credit Memo Reason? We do have about 60 invoices credit memos where the Credit Memo Reason is populated, but they are always populated automatically with values such as: