Any commits that used your old primary email address will no longer be associated with your account if you no longer have that email address associated with your account.

To revert, you would have to add that email address back and verify it. It doesn’t have to be your primary email address.

To prevent this becoming a problem in the future, especially if you are using an email address that is attached to a school or workplace, you can choose to select our email privacy feature and use a GitHub provided address for all of your commits. This isn’t a functional email address, but a way of associating your commits directly with your GitHub account instead of with a specific email address.