Integrated Imaging created a credit memo instead of an actual invoice, how to update/edit?

Summary

Integrated Imaging created a credit memo instead of an actual invoice, how to update/edit?

Content

The invoice did have the words credit memo within the invoice but it was not a negative amount.

We we tried to edit the type from Credit Memo to invoice in the invoice work area, this field is grayed out.

Why is this happening, how can it be prevented and what is the best method to update in Oracle Fusion?