Problem with apt maybe related to installation/configuration of apt-cacher-ng

[Dennis Heddicke <dheddicke@hotmail.com>]

    Hello,
    
    i have a problem with "apt update", everytime i execute the command,
    i get the following error messages:
    
    Get:1
        http://security.debian.org/debian-security bookworm-security
        InRelease [48,0 kB]
      
      Get:2 http://deb.debian.org/debian bookworm InRelease [193 kB]
      
      Err:1 http://security.debian.org/debian-security bookworm-security
      InRelease
      
       The following signatures were invalid: BADSIG 112695A0E562B32A
      Debian Security Archive Automatic Signing Key (10/buster)
      <ftpmaster@debian.org>
      
      Err:2 http://deb.debian.org/debian bookworm InRelease
      
       The following signatures were invalid: BADSIG 648ACFD622F3D138
      Debian Archive Automatic Signing Key (10/buster)
      <ftpmaster@debian.org>
      
      Fetched 241 kB in 0s (507 kB/s)
      
      Reading package lists... Done
      
      W: An error occurred during the signature verification. The
      repository is not updated and the previous index files will be
      used.
      GPG error: http://security.debian.org/debian-security
      bookworm-security InRelease: The following signatures were
      invalid:
      BADSIG 112695A0E562B32A Debian Security Archive Automatic Signing
      Key (10/buster) <ftpmaster@debian.org>
      
      W: An error occurred during the signature verification. The
      repository is not updated and the previous index files will be
      used.
      GPG error: http://deb.debian.org/debian bookworm InRelease: The
      following signatures were invalid: BADSIG 648ACFD622F3D
      138 Debian Archive Automatic Signing Key (10/buster)
      <ftpmaster@debian.org>
      
      W: Failed to fetch
      http://deb.debian.org/debian/dists/bookworm/InRelease  The
      following signatures were invalid: BADSIG 648ACFD622F3D138
      Debian Archive Automatic Signing Key (10/buster)
      <ftpmaster@debian.org>
      
      W: Failed to fetch
http://security.debian.org/debian-security/dists/bookworm-security/InRelease
       The following signatures were invalid:
      BADSIG 112695A0E562B32A Debian Security Archive Automatic Signing
      Key (10/buster) <ftpmaster@debian.org>
      
      W: Some index files failed to download. They have been ignored, or
      old ones used instead.
      
    I use Debian 12. The only changes i did before the problem
    occurred, were the installation of apt-cacher-ng and i ran "mach
    bootstrap" in a chroot. I don't think, the last thing would change
    this much the operating system, although it was a stupid idea. Even
    more stupid, since the solution for my problem  was the 
    installation of "sudo" in the chroot. 🙁 So maybe the first one is
    responsible for the problem.
    
    So far I tried the following configurations for apt-cacher-ng, to
    resolve the problem:
    
    Acquire::http::proxy
        "http://localhost:3142";
      
      Acquire::https::proxy "https://";
      
    and
    
    Acquire::http
          {Proxy "http://127.0.0.1:3142"; };
        
        Acquire::https {Proxy "https://"; };
      
    but none solved it.
    
    I hope someone can help me with my problem. Thank you in advance.
    
    Best Regards
    Dennis