Animation doesn't work on default skeleton

Greetings!

I’ve tried to create some animations for the default character. I’ve exported the dummy to fbx, imported into Blender, remade the skeleton (idk why it added a new parent bone for the root one) so it can match the original one, and exported. Now i have 2 identically skeletons, the original one and the edited one.

The problem is that when i’m importing the animation using the fbx mesh + edited skeleton everything works fine, but when i’m importing the animation using the original skeleton it doesn’t work anymore… It has the same number of frames but there’s no animation ¯ \ …(ツ) … /¯

Same skeletons

Works perfectly

Doesn’t give a piece of cake about my dreams and my life…