I'm doing a Unity runtime update from spine-unity-3.8-2019-10-14 to spine-unity-3.8-2021-07-12, but when I finished, if I run the game or just click on a SkeletonData asset in the Project view, it's saying the skel has to be re-exported with a newer version of Spine, even though both runtimes say "This Spine-Unity runtime works with data exported from Spine Editor version: 3.8.xx".
Any ideas? Is this by chance a known issue? I realize I'm jumping a big time gap here, but since they're both supposed to be compatible with 3.8.xx I thought I'd be ok.
If it helps, here's the full error printout (note that this error is for asset "WaterRipple_SkeletonData", but the same error is happening on all of our skels):
Error reading skeleton JSON file for SkeletonData asset: WaterRipple_SkeletonData
Unsupported skeleton data, please export with a newer version of Spine.
at Spine.SkeletonJson.ReadSkeletonData (System.IO.TextReader reader) [0x000b2] in C:\Users\Chris\Documents\_MoonlightKids\the-wild-at-heart\Assets\Spine\Runtime\spine-csharp\SkeletonJson.cs:103
at Spine.Unity.SkeletonDataAsset.ReadSkeletonData (System.String text, Spine.AttachmentLoader attachmentLoader, System.Single scale) [0x00017] in C:\Users\Chris\Documents\_MoonlightKids\the-wild-at-heart\Assets\Spine\Runtime\spine-unity\Asset Types\SkeletonDataAsset.cs:258
at Spine.Unity.SkeletonDataAsset.GetSkeletonData (System.Boolean quiet) [0x000c4] in C:\Users\Chris\Documents\_MoonlightKids\the-wild-at-heart\Assets\Spine\Runtime\spine-unity\Asset Types\SkeletonDataAsset.cs:173
Spine.Unity.SkeletonDataAsset:GetSkeletonData(Boolean) (at Assets/Spine/Runtime/spine-unity/Asset Types/SkeletonDataAsset.cs:176)
Spine.Unity.Editor.SkeletonDataAssetInspector:InitializeEditor() (at Assets/Spine/Editor/spine-unity/Editor/Asset Types/SkeletonDataAssetInspector.cs:147)
Spine.Unity.Editor.SkeletonDataAssetInspector:OnEnable() (at Assets/Spine/Editor/spine-unity/Editor/Asset Types/SkeletonDataAssetInspector.cs:84)