What is the proper way of moving keyframes of a linked object?

Hi everyone,
What is the proper way of altering keyframes of a linked object/armature that has animation?

Here is what I tried so far:

  1. Library overrided the object/armature. This way I can see the keyframes on dope sheet but can’t move them. I can add new keyframes but can’t move them either.
  2. I pushed down action but still can’t move the keyframes.

Edit: I’m not sure but is this directly related to my issue/question: T72629 ?