wmf-auto-reimage tries to remove a host from Debmonitor, and fails to do so, even when running with --new to install a new host.
It seems to me that is a bug and it should skip that when using --new
example output: 00:26:15 | mwmaint1002.eqiad.wmnet | WARNING: Unable to remove from Debmonitor, got: 404
from running "dzahn@neodymium:~$ sudo -i wmf-auto-reimage -d --new -p T201343 mwmaint1002.eqiad.wmnet" ( /var/log/wmf-auto-reimage/201809190022_dzahn_9192.log)