ID causing issues

I am trying to import users and if I include an id column, the import fails with this error: https://www.dropbox.com/s/z1bezmqdolp603m/Screenshot%202018-07-21%2020.46.40.png?dl=0

If I remove the column, the import works. Is there something special that needs to be done with the ID column?

Thanks!
Shawn