by Simon Heissler.
some time since we updated - but you should
a) informe teachers/staff about the update. layout, functionality, settings an nomenclature changes.
see https://docs.moodle.org/27/en/Upgrade_tool
see https://docs.moodle.org/23/en/Assignment_settings
b) disabled assignment 2.2 after uppgrading alla assignment. site administration/plugins/activity modules/manage activities /Hide assignment 2.2