Override the defaulted Payment terms for EPP Agreements

Summary:

Payment Terms are always defaulted onto the EPP Agreements based on the defined hierarchy. Using the REST API, we can update the Payment Terms, but we are unable to set them to null.
Is there any other process—such as an Approval Rule /Groovy Script—that can be implemented to make the Payment Terms null for EPP Agreements?
Please advise on the available options.

Version (include the version you are using, if applicable):

25C

Code Snippet (add any code snippets that support your topic, if applicable):