New Scene with copied meshes

I have problem with new scene.
I make new scene with linked objects.

Now, I want “unlink” one object, becouse if I delete keyframes from it, it also delete keyrames from my first scene.

With that object selected, go to the dope sheet. Change it to ‘Action Editor’. Then, make the action unique by clicking the button which shows how many users that action has. Pressing it makes a new action. Now you can edit the keyframes without editing the other ones…

Many thanks!