How the PA_ADDITION_FLAG is updated on the invoice?

Summary:

Hi All, may we know how the PA_ADDITION_FLAG is updated on the invoice?

Content (please ensure you mask any confidential information):

As per the user:

We have an AP invoice from Arcadis Consulting (UK) Ltd invoice # 680023332_cancelled that was cancelled and the reversal entries were not interface to the project module. Please see attached screenshot of the accounting entries in AP and the entries in the project module. \n\nOracle Cloud\nBU: Arcadis N.V\nSupplier: Arcadis Consulting (UK) Ltd\nInvoice #: 680023332_cancelled.

We will need to know how the PA_ADDITION_FLAG is updated to further check this.