Issue "apt update" does still an error message after applying the fix described on your support page

[jmar83]

Server operating system version

Debian 10.13

Plesk version and microupdate number

Plesk "Obsidian" 18.0.81 Update #3

Hi there

"apt update" does still an error message after applying the fix described on:
https://support.plesk.com/hc/en-us/...ified-because-the-public-key-is-not-available

Err:11 http://autoinstall.plesk.com/PHP74_17 buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
Err:14 http://autoinstall.plesk.com/PHP80_17 buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
Err:16 http://autoinstall.plesk.com/PHP81_17 buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
Err:20 http://autoinstall.plesk.com/PHP82_17 buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
Err:23 http://autoinstall.plesk.com/PHP83_17 buster InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
Fetched 4008 B in 3s (1173 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
144 packages can be upgraded. Run 'apt list --upgradable' to see them.
N: Ignoring file 'php.list.obsolete' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'tor.list.obsolete' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'mariadb.list.obsolete' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP74_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP80_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP81_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP82_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP83_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: Failed to fetch http://autoinstall.plesk.com/PHP74_17/dists/buster/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: Failed to fetch http://autoinstall.plesk.com/PHP80_17/dists/buster/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: Failed to fetch http://autoinstall.plesk.com/PHP81_17/dists/buster/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: Failed to fetch http://autoinstall.plesk.com/PHP82_17/dists/buster/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: Failed to fetch http://autoinstall.plesk.com/PHP83_17/dists/buster/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5B6AB2160B50DB96
W: Some index files failed to download. They have been ignored, or old ones used instead.

Why that...? Thank you very very much for your feedback(s).

 

[jmar83]

https://support.plesk.com/hc/en-us/articles/13302814724887-Unable-to-update-Plesk-The-following-signatures-couldn-t-be-verified-because-the-public-key-is-not-available?page=1#comment_44499640543639