Unity 6.3 Bug: There is no guarantee that subsequent imports of this asset will properly re-link to these targets.

[Whodifami]

Environments (please complete the following information):

• UniVRM version: VRM-0.131.2_a471 and VRM-0.131.1_6655
• Unity version: Unity-6000.3.9f1 and newer like 6.4 and 6.5 (I believe it's also present in 6.0 onward), I tested this on multiple versions.
• OS: Windows 10

Describe the bug

• A clear and concise description of what the bug is:
  I thought I knew, but now unsure... probably lack of sleep, errors below.

I don't know if this would be resolved with the UniVRM-0.131.2_a471 instead of VRM-0.131.2_a471 ? I don't really know the difference, I've been using the VRM one.

This bug is not present in Unity 2022.3 versions.

• ConsoleLog
  gltf: no vrm0
  UnityEngine.Debug:LogWarning (object,UnityEngine.Object)
  UniGLTF.UniGLTFLogger/DefaultUnityLogger:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[]) (at ./Packages/com.vrmc.gltf/Runtime/Utils/UniGLTFLogger.cs:26)
  UniGLTF.UniGLTFLogger:Warning (string,UnityEngine.Object) (at ./Packages/com.vrmc.gltf/Runtime/Utils/UniGLTFLogger.cs:64)
  UniVRM10.VrmScriptedImporterImpl:Import (UnityEditor.AssetImporters.ScriptedImporter,UnityEditor.AssetImporters.AssetImportContext,bool,UniGLTF.ImporterRenderPipelineTypes) (at ./Packages/com.vrmc.vrm/Editor/ScriptedImporter/VrmScriptedImporterImpl.cs:115)
  UniVRM10.VrmScriptedImporter:OnImportAsset (UnityEditor.AssetImporters.AssetImportContext) (at ./Packages/com.vrmc.vrm/Editor/ScriptedImporter/VrmScriptedImporter.cs:23)
  UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

and
Identifier uniqueness violation: 'Name:VRM1/VRM1/Root/J_Bip_C_Hips/J_Bip_C_Spine/J_Bip_C_Chest/J_Bip_C_UpperChest/MonoBehaviour-UniVRM10.VRM10SpringBoneCollider, Type:MonoBehaviour'. Multiple Objects with the same name/type are generated by this Importer. There is no guarantee that subsequent imports of this asset will properly re-link to these targets.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

• ScreenShot

• Reproduction procedure:
  Step 1 Install Unity 6000.3.9f1, or 6000.4.2f1, or 6000.5.4f1, and i think 6000.0.79f1
  Step 2 Create new URP 3D project
  Step 3 Add VRM-0.131.2_a471
  Step 4 Export a VRM 1.0 char from VRoid Studio and drag and drop it into the project.