3813892 - Error: "Record not loaded for Employee_ID XXXXX. The Login ID XXXXX is already assigned to another employee in this entity. Please provide a unique Login ID."

Our daily employee feed has triggered an error while setting up a new employee profile that the Login ID assigned to this profile is being used by someone else. How do I locate this profile and how do I fix this issue?

OR 

Our daily employee feed triggered an error when passing information for a existing user that the Login ID was already in use. How do I resolve the error?

Our employee import triggered an error stating that the Login ID is already assigned to another employee within our company. Record not loaded for Employee_ID XXXX. The Login ID XXXXX is already assigned to another employee in this entity. Please provide a unique Login ID. For more information about this or other errors, please search for the error message in our Knowledge Base. , KBA , CON-CA-TLS-IEM , Import / Extract Monitor , Problem