Mac with 2 monitors, how do i switch virtual desktops on one monitor only?

I have 2 monitors for mac, one extended the other.

How do i switch virtual desktops on one monitor only?

For example, When I do 4 fingers swipe left/right on screen1, I expect the switching happens on screen1 only.

BUT both monitors will switch virtual desktops at the same time, how do i avoid that?