[Bug 50251] New: Wrong public key from the repo prevents installation.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50251

Bug ID: 50251
           Summary: Wrong public key from the repo prevents installation.
           Product: Packaging
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: wine-packages
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
      Distribution: ---

Distro: Ubuntu 20.04

Followed instructions for Focal Fossa here:
https://wiki.winehq.org/Ubuntu

Got this error:

Err:10 https://dl.winehq.org/wine-builds/ubuntu focal InRelease
  The following signatures couldn't be verified because the public key is not
available: NO_PUBKEY 76F1A20FF987672F
Reading package lists... Done
W: GPG error: https://dl.winehq.org/wine-builds/ubuntu focal InRelease: The
following signatures couldn't be verified because the public key is not
available: NO_PUBKEY 76F1A20FF987672F
E: The repository 'https://dl.winehq.org/wine-builds/ubuntu focal InRelease' is
not signed.
N: Updating from such a repository can't be done securely, and is therefore
disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration
details.