keep constraint width when slider value is changed

I want my swift code below to keep the slider value of the width constraint when the sliders value is used for something else into my one of site: https://tinyurl.com/wvnx2tsw. You can see what is going on the gif below. When the value of the slider is used for something else the constraint changes. The constraints should not change when the value of the slider is considered for something else.