Unpair your YubiKey USB hardware token
If you no longer want to use your YubiKey to authenticate using PingID, you'll need to unpair it.
First, access the My Devices page. Here, the devices you currently have paired with your account are displayed along with your primary device highlighted in green.
Next, select your YubiKey. You may be asked to authenticate using your primary (default) authentication method.
Now, click the icon to the right of the device you want to remove to expand the entry, and then click the trash icon . You'll then be prompted to confirm your request.
If you only have one device or authentication method paired with your account, next time you log on you will be prompted to register a device in order to access your account.