In a Mock service, only the Initial variable is always used. I need the Current value

In a Mock service, only the Initial variable is always used but I need the Current value.

Data:

Postman version 9.21.2

Use a Mock service.

GET request

Situation:

The incoming request has a field: QR

I store the value of QR via an environment variable (variable_QR) in this way:

let param = pm.request.url.query.toObject().QR;

pm.environment.set (“variable_QR”,param);

This goes well and is kept as Current value.

Then I fill the response with this variable (variable_QR)

“qr”: {{variable_qr}}

The big problem is that the Initial value comes into the response and not the Current value.

Is there a possibility/script to get the Current value in the response?

Or is it possible to update the Initial with the Current value via a script?

Or is there another solution?

I look forward to a solution.

Thanks

Victor