While it is essential that all keys have at least one user ID, you can remove any additional user IDs that you have attached to the key.
Select the GnuPG keys keyring from the left side panel.
Select the Personal PGP key list.
Right click on the selected key and choose Properties ▸ Names and Signatures.
Select the user ID you want to remove and click Delete.
your keys after detaching the user ID to update the changes on the remote copy of the key.
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