3827732 - Error : "Sorry, something went wrong. The server encountered an error and could not complete your request. If you continue to experience problems, please contact your Company Administrator or Help Desk" (When trying to update Employee ID)

Admin is trying to update the employee id of a user and but getting an "Error 500" as mentioned in the title and getting kicked out from the page.

User is trying to update the profile but received "Error 500" (When trying to save profile - Duplicate Employee Id) , KBA , CON-CA-ADM-USR , User Administration , CON-CA , Cross Applications , Problem