We found bug with Unity Runtime importer if there are more skeletons in one spine project. If we export project with more skeletons into Unity then Unity Spine Automatic import does incorrectly assign Atlas Asset and Skeleton JSON for all except first skeletons. The other skeletonDatas (scriptable objects) get reference into that first one. In case that in other skeletons we use images that are not used in that first skeleton, since spine default behaviour is to strip out all unused images from atlas, we get not fixable GUI error loop.