Updating a CDT array with a single value in a process model

Hi all,

Before writing a CDT array to the database in my process model, I want to update all elements of the array with a different value. How can I do this?

For example, let's say I have a process variable named pv!myCDT (which is a CDT array) with this value:

{
    {
        name: "Ben",
        age: 60,
        retired: false
    },
    {
        name: "Sam",
        age: 65
        retired: false
    }
}

and I want to update all 'retired' fields to true. How can I do this in a process model? Should I use a script task for this?

I tried using a script task and added a custom output but this only changed the first element. It looked like this:
Expression = 'true',
Operator = 'is stored as'
Target = pv!myCDT.name

Thanks for the help!