PO Paid in full accidentally. Open questions how to rectify without data fix

RDBMS : 19.0.0.0.0
Oracle Applications : 12.2.12

Here’s the situation:

• PR 239675 (PO 3646019) was set up for a ~$2M insurance policy between company A (paying entity) and company B (receiving entity).
• This PR was approved by a number of folks up to the CFO
• The insurance policy is supposed be paid quarterly
• The entire PR was accidentally paid to company B
• We are going to ask company B to refund 75%; approx $1.5M
• We would like to make future payments to company B of ~ $500k for the remaining three quarters of the fiscal year without redoing the PR or PO.

Here’s the ask:

• We are unsure if there is a way to add funds to a PR or a PO in a way that does not trigger another set of iProcurement approvals.