Nick I removed SkeletonRenderSeparator component and re-added it and found that it does not clear the slots names for me. The old values reappears.
Harald Please find the documentation about the SkeletonRenderSeparator component here: spine-unity Runtime Documentation: SkeletonRenderSeparator and SkeletonPartsRenderer The reason for the observed behaviour is this paragraph: Nick wroteNote: This field is serialized at the SkeletonRenderer (or SkeletonAnimation and SkeletonMecanim subclass) component, SkeletonRenderSeparator just provides the interface for it.