GPG Key Expired

[thedoctar]

I get the following error when trying to run `sudo apt update`:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ddebs.ubuntu.com focal-updates Release: The following signatures were invalid: BADSIG C8CAB6595FDFF622 Ubuntu Debug Symbol Archive Automatic Signing Key (2016) <email address hidden>
W: Failed to fetch http://ddebs.ubuntu.com/dists/focal-updates/Release.gpg The following signatures were invalid: BADSIG C8CAB6595FDFF622 Ubuntu Debug Symbol Archive Automatic Signing Key (2016) <email address hidden>
W: Some index files failed to download. They have been ignored, or old ones used instead.

I'm using Ubuntu 20.04.4 LTS

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-dbgsym-keyring 2020.02.11.4
ProcVersionSignature: Ubuntu 5.13.0-44.49~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-44-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: LXQt
Date: Tue May 31 00:32:43 2022
Dependencies:

InstallationDate: Installed on 2020-05-11 (749 days ago)
InstallationMedia: Lubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: ubuntu-keyring
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Knickers Brown (metta-crawler)]

This is a duplicate. Please continue this thread on LP#1920640 bug #1920640

Also see
https://wiki.ubuntu.com/Debug%20Symbol%20Packages
<< Note: The GPG key expired on 2021-03-21 and may need updating by either upgrading the ubuntu-dbgsym-keyring package or re-running the apt-key command. Please see Bug #1920640 for workaround details if that does not work. >>