InvalidOperationException errors are throwing continuously on selecting "Output particle Distortion Quad" node preset asset.

Steps to repro:
1. Create anew HDRP template project.
2. Project Window > Right Click > Create > Visual Effects > Visual Effect Subgraph Operator.
2. Open VFX Subgraph operator > Drag range property.
3. Range > Output particle Distortion Quad > Create its preset.
4. Select the newly created preset asset.

Actual Result:
InvalidOperationException errors are thrown in the console.

Expected Result:
No error in the console.

Reproducible in:
2020.2.0a5 with 8.0.1, 2020.1.0b4 with 8.0.1, 2019.3.8f1 with 7.3.1,
2019.2.0f1 with 6.9.0.

Note: Subgraph operator is available in VFX Graph from 2019.2.

Environment:
Occurring on Windows 10 & Mac 10.15.

Stack trace:
InvalidOperationException: Owner is already set
UnityEditor.VFX.VFXSRPSubOutput.Init (UnityEditor.VFX.VFXAbstractRenderedOutput owner) (at Library/PackageCache/com.unity.visualeffectgraph@8.0.1/Editor/Models/Contexts/VFXSRPSubOutput.cs:18)
UnityEditor.VFX.VFXAbstractRenderedOutput.GetOrCreateSubOutput () (at Library/PackageCache/com.unity.visualeffectgraph@8.0.1/Editor/Models/Contexts/Implementations/VFXAbstractRenderedOutput.cs:82)
UnityEditor.VFX.VFXAbstractRenderedOutput.InitSubOutputs (System.Collections.Generic.List`1[T] subOutputs, System.Boolean invalidate) (at Library/PackageCache/com.unity.visualeffectgraph@8.0.1/Editor/Models/Contexts/Implementations/VFXAbstractRenderedOutput.cs:102)
UnityEditor.VFX.VFXAbstractRenderedOutput.OnEnable () (at Library/PackageCache/com.unity.visualeffectgraph@8.0.1/Editor/Models/Contexts/Implementations/VFXAbstractRenderedOutput.cs:89)
UnityEditor.VFX.VFXAbstractDistortionOutput.OnEnable () (at Library/PackageCache/com.unity.render-pipelines.high-definition@8.0.1/Editor/VFXGraph/Outputs/VFXAbstractDistortionOutput.cs:70)
UnityEditor.Presets.PresetEditor:OnEnable()