Error: The type 'ManualResetEventSlim' exists in both

For reference just updated from the official 2018 version (2018.4.23f1) to 2019.3.7f1.

The full error is:

Assets\AstarPathfindingProject\Core\RVO\RVOCoreSimulator.cs(805,13): error CS0433: The type ‘ManualResetEventSlim’ exists in both ‘System.Threading, Version=1.0.2856.102, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ and ‘netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51’

This error also exists a second time with:

Assets\AstarPathfindingProject\Core\RVO\RVOCoreSimulator.cs(806,13)…

Re-importing Astar seems not to help this issue. What might be causing this and how can I fix?

I’m not sure what the issue is and I cannot replicate this.
Does this happen in an empty project after you import the package?

Shit I’m sorry I forgot I customized one of your scripts a long time ago, and it wasn’t updating correctly before the upgrade. My bad, problem solved

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