I created a duplicate asset(animation sequence) both by clicking on duplicate in drop down menu, alt cicking + dragging to a new folder, and alt-dragging the asset. When I make changes to the copy of the asset, the changes(rotating bones or deleting frames), they get applied to the original asset as well. How do I make the copy of the asset a separate one?
Have you tried a copy and paste?
Yes copy pasting with Ctrl c Ctrl v also changes both assets.