The built-in mysql repository Index of /232905/apt/debian that is added to the bluecherry-buster.list (I assume automatically by the installer) has expired signatures.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B7B3B788A8D3785C
W: Failed to fetch http://repo.mysql.com/apt/debian/dists/buster/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B7B3B788A8D3785C
W: Some index files failed to download. They have been ignored, or old ones used instead.
I see that it’s locked to MySQL 5.7.
I tried to update the keys by doing:
wget -qO - http://repo.mysql.com/apt/debian | sudo apt-key add -
I got the following error:
gpg: no valid OpenPGP data found.
What do you recommend we do?
Solved with the following command:
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys B7B3B788A8D3785C