How to reproduce:
1. Create new HDRP project
2. Create new Shadergraph via Project tab and open it
3. In Hierarchy create new Area Light
4. Observe console

Error:
ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
System.Collections.Generic.List`1[T].get_Item (System.Int32 index) (at <96f838c04c564175a85f709a665a953d>:0)
UnityEngine.Rendering.HighDefinition.HDLightRenderDatabase.EditLightDataAsRef (UnityEngine.Rendering.HighDefinition.HDLightRenderEntity& entity) (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDLightRenderDatabase.cs:96)
UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.ComputeLightType (UnityEngine.Light attachedLight) (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDAdditionalLightData.Types.cs:514)
UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.get_type () (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDAdditionalLightData.Types.cs:233)
UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.UpdateBounds () (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDAdditionalLightData.cs:3153)
UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.OnValidate () (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDAdditionalLightData.cs:2851)
UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.Migrate () (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDAdditionalLightData.Migration.cs:189)
UnityEngine.Rendering.HighDefinition.HDAdditionalLightData.Awake () (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Runtime/Lighting/Light/HDAdditionalLightData.cs:2955)
UnityEditor.Rendering.HighDefinition.HDLightEditor:OnEnable() (at Library/PackageCache/com.unity.render-pipelines.high-definition@13.1.1/Editor/Lighting/HDLightEditor.cs:42)

Reproduced with: 2022.1.0a16
Does not reproduce with: 2022.1.0a15