Can the GBPA reference be changed using API/Interface tables for a Standard PO?

Oracle EBS 12.2.11

Oracle Purchasing

Question: Can the GBPA reference be changed using API/Interface tables for a Standard PO?

We are following the below steps:

1. We already have Standard POs created in Oracle

2. We are converting some GBPAs from legacy application

3. After importing the GBPAs, we are trying to update the Standard POs with the relevant GBPA information ( Standard PO Line --> "Reference Document" Tab --> Change the GBPA reference)

We need to know which API/Interface table we should use to update the Standard POs with new GBPA information