Steps to reproduce:

1. Create an HDRP Project

2. Import the Water Samples Project from the Package Manager for HDRP

3. Remove the HDRP Package

Reproducible with versions: 2023.3.0b4, 6000.0.0b15
Not reproducible with: 2021.3.37f1, 2022.3.25f1, 2023.2.18f1, 2023.3.0b3

Stacktrace:

at <unknown> <0xffffffff>
      at UnityEditor.AssetDatabase:StopAssetEditing <0x00066>
      at UnityEditor.VFX.VisualEffectAssetModificationProcessor:OnWillSaveAssets <0x00322>
      at <Module>:runtime_invoke_object_object <0x000dd>
      at <unknown> <0xffffffff>
      at System.Reflection.RuntimeMethodInfo:InternalInvoke <0x000af>
      at System.Reflection.RuntimeMethodInfo:Invoke <0x0011a>
      at System.Reflection.MethodBase:Invoke <0x0003d>
      at UnityEditor.AssetModificationProcessorInternal:OnWillSaveAssets <0x003fa>
      at <Module>:runtime_invoke_void_object_intptr&_intptr&_byte <0x00097>
      at <unknown> <0xffffffff>
      at UnityEditor.AssetDatabase:SaveAssets <0x00066>
      at UnityEditor.Rendering.HighDefinition.MaterialPostprocessor:SaveAssetsToDisk <0x000e2>
      at <>c:<RegisterUpgraderReimport>b__6_0 <0x002f2>
      at UnityEditor.EditorApplication:Internal_CallUpdateFunctions <0x000df>
      at System.Object:runtime_invoke_void <0x00084>

Tested on (OS): Windows 11