Maintain Employees - Error Code

Hi -  I have Sage 50 US Addition.  As I was editing a new employee's information last week, I got this error code:

And now, I can't edit or view the employee's information at all.  This has never happened before.  I haven't found any guidance on how to bypass this error or how to delete this employee's record from my system.  Anyone have any ideas or suggestions on how to fix this?