If this is too annoying for you on a Debian 12, as it is for me:
Open /etc/syslog-ng/syslog-ng.conf.
In the "Log paths" section, comment out the line:
log { source(s_src); filter(f_crit); destination(d_console); };
Restart the syslog-ng service:
systemctl restart syslog-ng.service
This will of...