Duplicate editing

ok so i am trying to make a dublicate of an object, and alter that duplicate, but when i do change something about the duplicate, the original changes. this is NOT WHAT I WANT to happen… any advice?

I’ve had this problem, you may need to go into the action editor and make the action clip a unique user so you can edit it separately.
Send the blend file if you can.

Use Shift+D and it will be a non linked duplicate.

Happy 2.5