How to amend the Payment Group Rule

Summary:

Payment Grouping rule is currently greyed out. What role or privilege would be needed to gain access to this area?

Content (please ensure you mask any confidential information):

We are looking to remove the supplier grouping rule for a specific supplier. They wish each invoice to be paid seperatly rather grouped into one amount. We have tried using the payment process profile option and remove the grouping, but this did not work.

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

24C

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