The configuration file provided in syslog-ng-core has "@version: 3.38",
which triggers the following warning on startup:

Followed by:

It looks like this unwelcome log noise was fixed in:

  commit ad9ce65e5956b47d8cdd42232a3f303cb4b1832b
  Author: SZALAY Attila <sasa@debian.org>
  Date:   Sun May 5 21:26:16 2024 +0100

      Update configuration and eliminate warnings

But then the fix was reverted in:

  commit 5cb6d625cb4fac2708b3834ac9bf234ffd279237
  Author: Laszlo Boszormenyi (GCS) <gcs@debian.org>
  Date:   Sun Aug 18 12:14:00 2024 +0200

      Revert copyright and autopkgtest changes

I wonder if this was intended?

A similar change makes it go away now.

We believe that the bug you reported is fixed in the latest version of
syslog-ng, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1050692@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
SZALAY Attila <sasa@debian.org> (supplier of updated syslog-ng package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sun, 18 Oct 2026 20:33:27 +0100
Source: syslog-ng
Architecture: source
Version: 4.12.0-1
Distribution: unstable
Urgency: medium
Maintainer: syslog-ng maintainers <syslog-ng-maintainers@alioth-lists.debian.net>
Changed-By: SZALAY Attila <sasa@debian.org>
Closes: 831908 833283 844372 970355 992428 996246 1050692 1111518 1138428 1143061
Changes:
 syslog-ng (4.12.0-1) unstable; urgency=medium
 .
   * New upstream version 4.12.0 (Closes: #1143061, #1138428)
   * Clean up old and obsolated bugs (Closes: #831908, #844372, #970355, #992428, #996246)
   * Prepare new temporary release
   * Update debian patches
   * Dropping removed SCL modules
   * Re-enable secure logging module
   * Add new SCL config files to the syslog-ng-scl module
   * debian: Migrate legacy syslog-ng configs on upgrade (Closes: #833283)
   * debian: Update default configs to 4.12 (Closes: #1050692)
   * debian: Fix init script LSB header.
     Thanks to Andrew Bower <andrew@bower.uk> (Closes: #1111518)
   * Commenting about the GRPC module into the debian/README.source
Checksums-Sha1:
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 b5b0514b17f66a835a07713ea4307b91b2b199b2 2491465 syslog-ng_4.12.0.orig.tar.gz
 50cdfcccc94a08e6a082ffe114b8d03637a0a463 47660 syslog-ng_4.12.0-1.debian.tar.xz
 0672b083121e98c2b1283c699c7a417241c367a6 18385 syslog-ng_4.12.0-1_amd64.buildinfo
Checksums-Sha256:
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Files:
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 bc6bf2abe2705ac7e8daa36118c61785 2491465 admin optional syslog-ng_4.12.0.orig.tar.gz
 406376180601ff6f9dd34d72393a9e59 47660 admin optional syslog-ng_4.12.0-1.debian.tar.xz
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