If you lose access to a Recovery Key, you should remove it from your Fuse wallet and add a new one.
Here’s how to remove a Recovery Key:
In the “Security" tab of your Fuse wallet, you can view the Recovery Keys that you have added.
Click on the three-dot button of the Recovery Key you want to remove. You will see options to change your key, view more info, and delete your key.
Select “Delete key" and click on “Confirm”. Your Recovery Key will now be removed from your Fuse wallet.