Default GameObject Tag: Player already registered [Error]

Hi,

I have searched around for this error, but none of the answers help. I have removed the tag, but when I press the drop down box to add a tag to an object, the Player tag still shows up, which causes this error.

Here is the Error: Default GameObject Tag: Player already registered

Please help,

Thank you

 

I know I'm a bit late, but you have to close Unity, open your project folder, then navigate to

ProjectSettings\

and open

TagManager.asset

with your text editor.
If you see two tags with same names in there(e.g "- Player" and "- Player"), remove one of them and save the document.
Open the project in Unity and everything should be working
EDIT:
If it still gives the same error, remove the second name from the document too(this happens because this is a default tag and it is registered in Unity's code, so it doesn't need to be in the Tag Manager).