copy/duplicate slide without changing variable names

Thx for your reply :) But in my case I want all dials in my project to use the same one and only dial-variable and not separate variables for each dial.

In your screenshot you see: "Dial1 & Dial2"

I dont want to have 2 variables like: "Dial1 & Dial1", instead I just want to have 1 variable for all dials like: "Dial"

Now I am looking for a way to copy my first slide with a dial that uses the dial-variable "Dial", without generating a second dial-variable "Dial1" for the dial of the slide-copy. Instead it should just create a exact copy where the dial uses the same already existed dial-variable "Dial".

As you wrote "Only one variable can be associated with each dial object at a time", but I want to associate one variable with many dial objects and thats possible