I can't change clip in animator

I have premade clips. later I added animator to an object and drag them to animator. but I can’t change its clip.
it just remains as None (motion) .

So I tried to add first animator and make some clips and problem solved.

But do I have to add an animator first to an object then add some clips and tweak them?

does this order really matter? I’m sure there’s a way I don’t know

Thank you.

Make sure the clip is not marked as being legacy:

  • Select it in the project view
  • In the inspector, click the little cog in the upper left and select debug
  • deselect it