CinemachinePostProcessingEditor error after collab download

Hey, I have a project that works and everything is uploaded in collab.

When I download the new instance of that project from the cloud I get this error.

Assets\CinemachinePostProcessingV2\Editor\CinemachinePostProcessingEditor.cs(20,41): error CS0433: The type 'CinemachinePostProcessing' exists in both 'Assembly-CSharp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' and 'Cinemachine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'

Please note that its not the
""The type or namespace name `PostProcessing' does not exist in the namespace" error, that is what googling took me to.

I tried removing and re-adding PostProcess and Cinemachine from package manager multiple times.
I tried removing and re-adding UNITY_POST_PROCESSING_STACK_V2; in player settings.
Tried restarting Unity.

didn't help. As far as i can tell I don't have multiple copies of postprocess or traces of post process v1.

What I can I do to fix this?