Getting error in 2020 :/ Anybody found any fix yet?

Error:
`We can't assign a new GUID because the asset is in an immutable folder. The asset will be ignored.`

Not resolved, happened in 2019.30f6

GUID [1c9c4a238add64ca5abfbefda455966a] for asset 'Packages/com.unity.ads/Plugins/iOS/UnityJsonAdditions.h' conflicts with:
'Assets/Plugins/iOS/UnityJsonAdditions.h' (current owner)
We can't assign a new GUID because the asset is in an immutable folder. The asset will be ignored.

When I updated Shader Graph package:
GUID [b15bfa6d4567d46ada191b75389088a7] for asset 'Packages/com.unity.render-pipelines.core/Runtime/Utilities/CameraCaptureBridge.cs' conflicts with:
'Packages/com.unity.render-pipelines.lightweight/Runtime/CameraCaptureBridge.cs' (current owner)
We can't assign a new GUID because the asset is in an immutable folder. The asset will be ignored.

I have tried with Unity 2019.2.4f1 and it still has a lot of warnings (70+)

Example:

GUID [a2960ffde020f27409e070d92fb2e00b] for asset 'Packages/com.unity.postprocessing/PostProcessing/Textures/Lens Dirt/LensDirt02.png' conflicts with:
'Assets/PostProcessing/Textures/Lens Dirt/LensDirt02.png' (current owner)
We can't assign a new GUID because the asset is in an immutable folder. The asset will be ignored.

This problem hasn't been fixed, plenty of warnings have appeared when importing packages.

Still occurring in LTS 2018.4.5f1. It generates 836 warning messages in our project!

I have the same error "dublicated GUIDs". I got it fixed. I uninstalled it from Window => Package Manager "Post Processing". Then I downloaded and imported Post Processing Stack V2 from Asset store. Errors no longer appear.

Me helps delete the duplicates and then:
Go to Edit => Preferences. In the Preferences window go to GI Cache Tab.
And then click clean cache.
Restart Unity

This problem is not fixed. Getting tons of errors like these :

"GUID [c55042318a938344ab23cd7f09dd0076] for asset 'Packages/com.unity.postprocessing/PostProcessing/Textures/Blue Noise 64px/LDR_LLL1_8.png' conflicts with:
'Assets/Textures/Blue Noise 64px/LDR_LLL1_8.png' (current owner)
We can't assign a new GUID because the asset is in an immutable folder. The asset will be ignored."

and these

"Ignoring asset refresh of Packages/com.unity.postprocessing/PostProcessing/Editor/Utils because the folder it is in has not been imported yet!

0x00000001414122F8 (Unity) StackWalker::GetCurrentCallstack
0x00000001414187A6 (Unity) StackWalker::ShowCallstack
0x00000001412FC02B (Unity) GetStacktrace
0x00000001401432FE (Unity) DebugStringToFile
0x0000000141EF73B1 (Unity) AssetInterface::ProcessAssetsImplementation
0x0000000141F0116C (Unity) AssetInterface::StopAssetEditing
0x0000000141EFC5D0 (Unity) AssetInterface::RefreshInternal
0x0000000141EF93FC (Unity) AssetInterface::Refresh
0x0000000141EB3E45 (Unity) AssetDatabase::Refresh
0x000000014065A3C9 (Unity) CallbackArray::Invoke
0x00000001413388C1 (Unity) Application::TickTimer
0x00000001414953AB (Unity) MainMessageLoop
0x0000000141497046 (Unity) WinMain
0x000000014247897A (Unity) __scrt_common_main_seh
0x00007FFC1A663034 (KERNEL32) BaseThreadInitThunk
0x00007FFC1C733691 (ntdll) RtlUserThreadStart"

when importing the postprocessing stack v2 from the package manager.

What to do?

This problem is not fixed.

I have the same error for multiple files part of the Post Processing Stack v2 after uninstalling the old githug version I had and re installing it from the package manager.

I uninstalled it and re installing it from an empty scene and I'm running Unity 2018.3.2f1

Please help.

If there are no immediate solution, can I please be pointed to information on how to resolve GUID conflicts? I dont mind fixing it manually for now.