The UCR templates of univention-maintenance have to be python3-compatible.
univention-maintenance (11.0.0-2) d887ff06f3da | Bug #51020: make UCR templates compatible to python3 univention-maintenance.yaml 1b4c313f3c4a | YAML Bug #51020
OK: code change OK: changelog entry OK: advisory OK: package built and installable
<http://errata.software-univention.de/ucs/4.4/510.html>