I did some research and found that this issue had been reported on GitLab: https://gitlab.com/mailman/mailman/-/issues/957
As per their suggestions, I made the following modifications to /usr/share/mailman3-web/settings.py, and these errors are wiped out! *** /usr/share/mailman3-web/settings.py.bak 2022-10-15 19:19:31.000000000 +0900 --- /usr/share/mailman3-web/settings.py 2025-01-16 17:25:48.367833980 +0900 *************** *** 166,171 **** --- 166,172 ---- #} } + DEFAULT_AUTO_FIELD = 'django.db.models.AutoField' # If you're behind a proxy, use the X-Forwarded-Host header # See https://docs.djangoproject.com/en/1.8/ref/settings/#use-x-forwarded-host *************** *** 396,401 **** --- 397,403 ---- # Q_CLUSTER = { 'timeout': 300, + 'retry': 360, 'save_limit': 100, 'orm': 'default', 'poll': 5, On Mon, 13 Jan 2025 04:57:02 +0000 "Debian Bug Tracking System" <ow...@bugs.debian.org> wrote: > Thank you for filing a new Bug report with Debian. > > You can follow progress on this Bug here: 1092899: > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1092899. > > This is an automatically generated reply to let you know your message > has been received. > > Your message is being forwarded to the package maintainers and other > interested parties for their attention; they will reply in due course. > > Your message has been sent to the package maintainer(s): > Debian Mailman Team <pkg-mailman-hack...@lists.alioth.debian.org> > > If you wish to submit further information on this problem, please > send it to 1092...@bugs.debian.org. > > Please do not send mail to ow...@bugs.debian.org unless you wish > to report a problem with the Bug-tracking system. > > -- > 1092899: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1092899 > Debian Bug Tracking System > Contact ow...@bugs.debian.org with problems -- MIZUHARA Bun <mizuh...@acm.org>