How to update Item Rates in Customer Program

Summary:

We have a requirement to update Item Rates in an existing Active Customer Program

Content (please ensure you mask any confidential information):

When we open an existing active program, I don't see any way to update the Item Rates or Amount. Please suggest, how to update these Item Rates in an active Program.

I only see below mentioned options - Cancel, Terminate, Update. But can't see any option to Edit the Program to make some updates on the Program. Please suggest, how to enable Edit capability on the Customer Program

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