If your key is expired, you must update the expiration, export the new key, delete the expired key in your GitHub account, and upload the new key to GitHub. Your previous commits and tags will show as verified, as long as the key meets all other verification requirements.
If your key is invalid and you don't use another valid key in your key set, but instead generate a new GPG key with a new set of credentials, then your commits made with the revoked or expired key will continue to show as unverified. Also, your new credentials will not be able to resign or verify your old commits and tags.

Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.
