Problem Importing Second Animation

[SephirotFenix]

I have a problem importing a second animation:
First I uploaded a model, use the auto-riging and chose the "Catwalk Walking" animation, download the fbx importing into Blender and it works wonderfully.
But then when I download another animation with Mixamo, I download the "Crawling" animation (Without Skin), then I import it into blender and with NLA I try to add it to the existing Armature, the bones do not match, I don't know why.

Could someone tell me why this happens?

I'm newbie.

[SephirotFenix]

I just realized something interesting, when I download the second fbx with the animation, if I download it with texture and import it to blender everything fits well, but if I download it without texture that's when it doesn't match, It is worth mentioning that I had to upload the model again and do the auto-riging, and make the marks again.

[Ussnorway]

yes without skin = a different base model... well done for working it out on your own and thanks for telling us you got it sorted