We have found that if a user goes back to the login page of the website and attempts to log into the site with their user name and password and they are already logged in, the system will allow them to enter their UID and Password but the site renders a 500 Internal server error.

Please fix this so that when a logged in users goes back to the login page, there is messaging telling them that they are already logged in OR proper error handling is in place. It is easy for a user to click the Login bookmark or hit the back button and then they are asked to log in again even though they are already logged into the system.