Guten tag @MoritzMuehlenhoff , would you be able to update the Jenkins Debian package on our apt.wikimedia.org repository please? reprepro should just work ( https://wikitech.wikimedia.org/wiki/Jenkins#Updating ).
There is no urgency though, it does not have any security fixes, it is just a new LTS version.
I have upgraded Jenkins on release hosts and restarted it.
contint1001 still has to be upgraded/restarted. I was looking for a good time window to do it but it has been busy all day long :-\