Setting up printer but getting error "port already exists"

In the Windows Settings app,

Devices (or Bluetooth and Devices) → Printers and Scanners → Print Server Properties (scroll down to view)

and open the "Ports" tab at the top of the window that appears.。

A list of ports will then be displayed. The error can be resolved by deleting the port name "spl3.sic.shibaura-it.ac.jp_KX" from the list.
("Port" is like a connection port for the computer and printer to exchange data.)

If you receive an error message "The selected resource is in use" when deleting,

1. From the "Printers and Scanners" screen, click on the university's printer settings you created in the past (if any), click on "Open Queue", and in the queue list screen, right-click→ Cancel All Documents (if none, skip this step).
2. From the "Printers and Scanners" screen, click on the university printer settings you created in the past, if any, and click "Delete".
3. Try deleting the port again, and if the error appears again, restart the computer itself.
4. If you try deleting the port again and the error appears again, please contact the Information Center for Academic Affairs.