Checkmk Werk 13928: validation of custom tag-groups through the REST API

ID: 13928 Title: validation of custom tag-groups through the REST API Component: Core & setup Level: 1 Class: Bug fix Version: 2.2.0i1 To create and edit custom tag groups via the REST API, one had to restart Apache after a new tag was created and before it could be used. This werk fixes this behaviour. A restart is no longer necessary for the tag-groups to be editable right after creation. Note: The documentation of the custom created tags in the ReDoc component are still only updated after an Apache restart. This does not affect the editability of the tags though.