Selecting “SampleScene” as Scene Asset for a Sub Scene throws “Circular reference detected” error in the Console window

Steps to reproduce:
1. Create new Unity project
2. Install Entities package via Package Manager
3. Create a new Sub Scene in Hierarchy window
4. Select new Sub Scene in Hierarchy window
5. Open “Select Scene Asset” window from Inspector window
6. Select “SampleScene”
7. Observe the Console window

Actual results: “Circular reference detected” error is thrown in the Console window
Expected results: No errors are thrown in the Console window

Reproducible with versions:  6000.4.2f1, 6000.5.0b3, 6000.6.0a2
Can’t test with versions: 6000.3.13f1 (different error is thrown in the Console ([Internal link])), 6000.0.72f1 (throws “Recursive SubScene setup detected”)

Tested on (OS): Ubuntu 24.04, macOS Silicon Tahoe 26.3.1 (M1)

Error:

 Circular reference detected: Attempted to convert Scene 'Assets/OutdoorsScene.unity' into a Sub Scene. A scene cannot reference itself as a SubScene.
UnityEngine.Debug:LogError (object,UnityEngine.Object)
Unity.Scenes.Editor.SubSceneInspector:HandleChangedSceneAssetReferences () (at ./Library/PackageCache/com.unity.entities@a50b5eb4e404/Unity.Scenes.Editor/SubSceneInspector.cs:72)
Unity.Scenes.Editor.SubSceneInspector:OnInspectorGUI () (at ./Library/PackageCache/com.unity.entities@a50b5eb4e404/Unity.Scenes.Editor/SubSceneInspector.cs:384)
UnityEditor.GUIView:ProcessEvent (UnityEngine.EntityId,intptr,bool&) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUIView.cs:70)