Comment # 3 on bug 1059021 from Dominique Leuenberger

(In reply to Wnereiz Z from comment #2)
> Created attachment 740833 [details]
> /var/log/zypper.log

2017-09-18 08:16:31 <1> susehost(2983) [zypper] main.cc(main):75 ===== 'zypper'
'up' =====

The only valid way to keep a Tumbleweed setup up-to-date is 'zypper dup'; As
such, this bug is invalid

(zypper dup knows how to take care of package removals, downgrades, and
everything needed to keep things going)