Release 1.5.6 kelvin without `create_share`. Start from 1.5.5 and revert fa2b7d03 cfa89fe3 420dd891). `create_share` attribute breaks the Kelvin client for versions <1.6.0. GitLab issue: https://git.knut.univention.de/univention/ucsschool/-/issues/785 Related to https://git.knut.univention.de/univention/ucsschool/-/issues/784
Kelvin 1.5.6 has been released