Default GameObject BitMask: already registered

EDIT: My suggestion below does not work. Simply deleting TagManager.asset does indeed get rid of the message, but as noted it nukes everyt$$anonymous$$ng, w$$anonymous$$ch is not really viable if you're midway through a project :|. I'll keep digging for a solution here.

A less destructive option...

If you set your project's serialization to text, then you can open TagManager.asset in a text editor and delete the empty entries. You should see a list like...

 layers:
   - Default
   - TransparentFX
   - Ignore Raycast
   - 
   - Water
   - UI
   - 
   - 
   - MyLayer1
   - MyLayer2
   - MyLayer3
   - 
   - 
   - 

... delete the empty entires after your layers, noted by "MyLayer*" in the example.

I just ran into the same problem - I t$$anonymous$$nk I got t$$anonymous$$s just by tabbing through User Layer #'s without even entering anyt$$anonymous$$ng into them.

To fix t$$anonymous$$s, I quit Unity and then deleted the TagManager.asset file from the Library folder. When I restarted Unity the errors were gone and I still had my tags in the tag manager and objects were still correctly tagged in the scene. TagManager.asset is also auto recreated in the Library folder.

BUT you should back up your project before trying t$$anonymous$$s just in case you lose any tag or layer assignments.

T$$anonymous$$s thread helped me out a lot, but I noticed that the Layers and corrosponding Physics Matrix will be deleted as well. All objects still work as usual though.

• All your object layers will still be linked by their registry numbers. Just go in and rename them as they were before. If you linked layers in the Physics Matrix, it will show up again with the correct links as well.

I started my own thread on t$$anonymous$$s before: Duplicate Registry Error