Burst 1.0.0-preview-3 PropertyChangingEventHandler error

I'm getting the following error after updating to 1.0.0-preview-3. It wasn't occurring under 1.0.00-preview-1:

Code (CSharp):

1. Library\PackageCache\com.unity.burst@1.0.0-preview.3\Runtime\BurstCompilerOptions.cs(186,38): error CS0433: The type 'PropertyChangingEventHandler' exists in both 'Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=null' and 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
2.  

I do have a Newtonsoft.Json DLL in my project, though I'm not sure why the DLL in my main project would conflict with the package.

 

Not duplicate threads
https://forum.unity.com/threads/burst-conflict-error-after-update-1-0-0-preview1-to-preview2.644098/

 

Totally missed it. Thanks.