Get error when create an account owner for an external bank account though REST API

Summary:

Hi all

How to add an account owner for an external bank account though REST API?

Is there a correct interface request example？

—Business Scenario：

Supplier A already exists in the system, with bank account 123

Then，new supplier B has been created, but the bank account is still 123

when create a payment instrument assignment ，get error "You can't create a bank account or credit card assignment without adding a payer or a payee party as the owner. (IBY-825844)"

How should this business scenario be handled though REST API?

Get error when create an account owner for an external bank account though REST API