ensuring zypper dup does not reinstall packages

I recently uninstalled all games, but zypper dup wants to reinstall them.
The same applies to some of the xfce packages (xfce4-power-manager, xfce-screenshooter, others…)
I tried to completely remove xfce, including using zypper rm -t pattern xfce.
How can I avoid this?

in yast select Software Management

then select the package that is not required, and set to “Taboo – Never Install”

zypper dup will respect such selections

if no games are required, do the same for the package 'patterns-openSUSE-games ’

Thank you! :cool: