Steps to reproduce:
1. Create new Unity project using HDRP 3D Template
2. In Project window create VFX Asset
3. Enter Play Mode
4. Select created VFX Asset
5. In Inspector window check “Use as Template” checkbox
6. Observe the Console

Actual results: Selected VFX Asset in Play Mode can be converted to a Template

Expected results: Selected VFX Asset in Play Mode cannot be modified or converted to a Template

Reproducible with versions: 6000.4.0a2 (79bd4f638ac0), 6000.4.0b11, 6000.5.0a8
Not reproducible with versions: 6000.3.10f1, 6000.4.0a1 (b27b8eafe426)

Tested on (OS): macOS Silicon Tahoe 26.3 (M1)

Notes:
When converting VFX Asset to a Template in Play Mode only in 6000.5.0a8, error is thrown in the Console:
{code:java}
Exception: AssetDatabase.ForceReserializeAssets cannot be used when in play mode
UnityEditor.AssetDatabase.ForceReserializeAssets (System.Collections.Generic.IEnumerable`1[T] assetPaths, UnityEditor.ForceReserializeAssetsOptions options) (at /Users/bokken/build/output/unity/unity/Modules/AssetDatabase/Editor/ScriptBindings/AssetDatabase.bindings.cs:959)
VisualEffectAssetEditor+<>c__DisplayClass53_0.<CreateInspectorGUI>b__1 (UnityEditor.SerializedObject x) (at ./Library/PackageCache/com.unity.visualeffectgraph@629e71309143/Editor/Inspector/VFXAssetEditor.cs:720)
UnityEditor.UIElements.Bindings.DefaultSerializedObjectBindingImplementation+<>c__DisplayClass10_0.<TrackSerializedObjectValue>b__0 (System.Object e, UnityEditor.SerializedObject o) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/DefaultSerializedObjectBindingImplementation.cs:224)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContextUpdater.OnUpdate (UnityEngine.UIElements.BindingContext& context) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/SerializedObjectBindingContextUpdater.cs:84)
UnityEditor.UIElements.Bindings.SerializedObjectBindingContextUpdater.Update (UnityEngine.UIElements.BindingContext& context) (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/Bindings/SerializedObjectBindingContextUpdater.cs:65)
UnityEngine.UIElements.BindingUpdater.UpdateUI (UnityEngine.UIElements.BindingContext& context, UnityEngine.UIElements.CustomBinding customBinding) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Bindings/BindingUpdater.cs:190)
UnityEngine.UIElements.BindingUpdater.UpdateUI (UnityEngine.UIElements.BindingContext& context, UnityEngine.UIElements.Binding bindingObject) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Bindings/BindingUpdater.cs:123)
UnityEngine.UIElements.VisualTreeDataBindingsUpdater.Update () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Bindings/VisualTreeDataBindingUpdater.cs:225)
UnityEngine.UIElements.VisualTreeUpdater.UpdateVisualTreePhase (UnityEngine.UIElements.VisualTreeUpdatePhase phase) (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/VisualTreeUpdater.cs:146)
UnityEngine.UIElements.Panel.UpdateDataBinding () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:1487)
UnityEngine.UIElements.Panel.TickSchedulingUpdaters () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/Panel.cs:1506)
UnityEngine.UIElements.UIElementsUtility.UpdateSchedulers () (at /Users/bokken/build/output/unity/unity/Modules/UIElements/Core/UIElementsUtility.cs:297)
UnityEditor.RetainedMode.UpdateSchedulers () (at /Users/bokken/build/output/unity/unity/Modules/UIElementsEditor/RetainedMode.cs:43)

{code}