I have a drop down menu that is used multiple times in a form. When I copy and paste it, they are all connected. So when I select level 4, it puts level 4 in ALL the drop down menues that I copped and pasted

I am making a PDF a form and I have a drop down menu that is used multiple times. You have to chose 1-4. When I copy and paste it it connects ALL the drop down menus so when you chose a level, it puts that level in all the boxes. How do I allow the reader to chose any level and not have them connected