Incorrect Payment Terms in PO and BPA, steps to update and the downstream impact

Summary:

We had a mass update of the payment terms in Supplier Master. This is not being reflected in the BPA and PO created prior. Therefore, we are paying same suppliers with different payment terms.

All documents needs to be updated to reflect the payment terms as per the updates in supplier master. During the exercise, please also advise any implications on the downstream transactions with this change. Can we able to update to the PO which are closed for receiving and Incomplete status?

The  payment terms in supplier master do change, the payment terms for the open documents like BPA and PO should also be reflecting the payment terms in the supplier master file going forward. Please provide a solution on how to automate this with configuration options available.