Comment 3 for bug 1976313

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. >>