This is basically a clone of T296856, but for the kafka-main200[1-3] nodes. If you have time next week we should try to upgrade the firmware in kafka-main2003, but I'd need to set up some downtime beforehand since the host is very important. If the upgrade solves the Debian install issue I'll ask to upgrade the other two nodes :)
Let me know a time that could work for you, I'd need 10 mins of time ahead to stop daemons etc..
Hosts to upgrade: