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Resolved MariaDB: 4C470FFFEFC4D3DC59778655CE1A3DD5E3C94F49 (untrusted public key algorithm: rsa2048)

maennchen1

New Pleskian
Server operating system version
Ubuntu 24.04.3 LTS
Plesk version and microupdate number
18.0.75
Hi!
System OS: Ubuntu 24.04.3 LTS
Plesk: 18.0.75

I got this error after "apt update" as root:
[...]
Fehl:1 Index of /legacy/tools/ubuntu/ noble InRelease
Die folgenden Signaturen waren ungültig: 4C470FFFEFC4D3DC59778655CE1A3DD5E3C94F49 (untrusted public key algorithm: rsa2048)
Paketlisten werden gelesen… Fertig
N: Datei »plesk.list.ai_back« in Verzeichnis »/etc/apt/sources.list.d/« wird ignoriert, da sie eine ungültige Dateinamen-Erweiterung hat.
W: GPG-Fehler: Index of /legacy/tools/ubuntu/ noble InRelease: Die folgenden Signaturen waren ungültig: 4C470FFFEFC4D3DC59778655CE1A3DD5E3C94F49 (untrusted public key algorithm: rsa2048)
E: Das Depot »Index of /legacy/tools/ubuntu/ noble InRelease« ist nicht signiert.
N: Eine Aktualisierung von solch einem Depot kann nicht auf eine sichere Art durchgeführt werden, daher ist es standardmäßig deaktiviert.
N: Weitere Details zur Erzeugung von Paketdepots sowie zu deren Benutzerkonfiguration finden Sie in der Handbuchseite apt-secure(8).

How can I fix it?
 
Install the latest signing key:

Bash:
sudo curl -o /etc/apt/keyrings/mariadb-keyring.pgp 'https://mariadb.org/mariadb_release_signing_key.pgp'
 
Hi, @maennchen1 . Have you previously modified /etc/apt/apt.conf.d/99weakkey-warning? If possible, could you please share its content? Thank you in advance.
 
Thanks, please try running the following command:

Code:
echo 'APT::Key::Assert-Pubkey-Algo ">=dsa1024,rsa4096,rsa3072,rsa2048";' | tee /etc/apt/apt.conf.d/99weakkey-warning

I will ignore errors for weak repository signature keys. Once done, please try re-running the update.
 
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