Hi Misaki ! Thanks for your reply.
What I mean is I can reference two Skeleton Animation (each one with its skins and animations), but if I try to reference, for instance:
[SpineAnimation]
public string animation;
The only options I'm given in the Unity inspector are animations from one of the Skeleton Animation. Same for skins (at least, the skins options are labeled with the asset containing them, so I can now they are from the same skeleton animation.
I hope I'm being clear, if not, don't hesitate to ask me for further information, I'll do my best explaining myself.
Thank you!