Every once in a while we get these:
<icinga-wm> PROBLEM - Check systemd state on otrs1001 is CRITICAL: CRITICAL - degraded: The following units failed: spamassassin_updates.service https://wikitech.wikimedia.org/wiki/Monitoring/check_systemd_state
This is only visible since recently the spamassassin update was moved from cron to systemd timer.
That's why it now causes the alerts. Does not mean it wasn't happening before with the cron.