UE4.21 crashes when duplicating level in content browser

Hi everyone, UE4 crashes every time I duplicate a level in my project. I’m getting this error:

I have tried to revert my project back to my last commit before I did anything new when it was working, but it still crashes when I duplicate any levels. I have also tried duplicating from the file explorer, but it doesn’t show up. any help is appreciated :slight_smile:

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks