Attempted upgrade on Debian 10 to Mailman3.3 went badly. Prior to attempted upgrade system was working but with incremental unsubscribes due to erroneous bounces upping subscribers scores. Restored from backup. System now not working. Postorius webpage says "Mailman REST API not available. Please start Mailman core." Mailman will not start. Command line thread is as follows:
root@lists:~# systemctl start mailman Job for mailman.service failed because the control process exited with error code. See "systemctl status mailman.service" and "journalctl -xe" for details. root@lists:~# systemctl status mailman.service ● mailman.service - GNU Mailing List Manager Loaded: loaded (/lib/systemd/system/mailman.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Sat 2023-12-23 09:01:41 PST; 5min ago Process: 3773 ExecStart=/opt/mailman/mm/bin/mailman start (code=exited, status=2)
Dec 23 09:01:41 lists.ccalternatives.org systemd[1]: Starting GNU Mailing List Manager... Dec 23 09:01:41 lists.ccalternatives.org mailman[3773]: Usage: mailman start [OPTIONS] Dec 23 09:01:41 lists.ccalternatives.org mailman[3773]: Try 'mailman start -h' for help. Dec 23 09:01:41 lists.ccalternatives.org mailman[3773]: Error: A previous run of GNU Mailman did not exit cleanly (host_mismatch). Try using --force Dec 23 09:01:41 lists.ccalternatives.org systemd[1]: mailman.service: Control process exited, code=exited, status=2/INVALIDARGUMENT Dec 23 09:01:41 lists.ccalternatives.org systemd[1]: mailman.service: Failed with result 'exit-code'. Dec 23 09:01:41 lists.ccalternatives.org systemd[1]: Failed to start GNU Mailing List Manager. root@lists:~#
Please help. Thank you!