Updating import status for Project based invoices

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Hi Team. We have a data migration requirement to create PO matched project based invoices and ensure that they do not get imported further in Projects.
Kindly let us know if there is a way to restrict interfacing of these invoices to Projects.

Moreover, we came across the column PA_ADDITION_FLAG in AP_INVOICE_DISTRIBUTIONS_ALL table. This flag is not present in the Invoices FBDI (which we are using to create the invoices). The description of this column says:

Oracle internal use only. Indicates whether project related invoice distributions have been transferred to Oracle Fusion Projects. Valid values: Y, N.