Moving icons in one frame moves it in another


I created my first Figma design in a frame.
I have used comes from the free community icons design.

Then I duplicated the frame by copying and pasting it to make different versions of it.
Quite oddly in the duplicated version it looks I can’t quite select a particular icon or move it. If I delete it them it removes all the icons including the one in the original frame.

More surprisingly if I move individual icons in the original one the icons in the second frame moves as well.

Please will you help me understand what am I doing wrong and why is this happening?

Can I not copy and paste and make duplicated frames work in it’s own right?