I sold my watch but my apple ID is still on it. How do I get it removed?

Hi

To turn off Activation Lock on the watch now that you no longer have it:

• On a computer, go to https://www.icloud.com/
• Sign in with your Apple ID.
• Open Settings.
• Under My Devices, click on your Apple Watch.
• Click the "X" next to your device.
• Click Remove to confirm.

The new owner will then be able to proceed with pairing and set up.

I did that but doesn't work, the person is logged in with his Apple ID but still appears on my list of devices, I delete it and every time the clock is online appears on my device list and his...