[opensuse-kubic] transactional-update (no options)

Hi all, I just typed 'sudo transactional-update' without a dup, pkg or shell option and it calls automatically for a zypper up, while i was expecting an error that says please add an option. Also a zypper dup would make more sense then as my MicroOS desktop is based on TW and not Leap. Is there a reason it calls for zypper up or is it something that could be changed? BR, Syds