In https://forge.univention.org/bugzilla/show_bug.cgi?id=55119 we added classes for linux + ubuntu clients. With that, these computers can be added to computer rooms. Now the behavior is inconsistent in the computer (school) umc module: one can edit or remove existing ubuntu or linux computer, but not create.
A few more details: in the UCS@school library the Python classes for Ubuntu and Linux machine objects were included. This leads on the one hand to the fact that in "import_computer" these computer roles can now also be imported. Likewise, in the UMC "computer room administration" module, these computer roles can now also be added to computer rooms. On the other hand, in the UMC module "computers (schools)" these computer roles can NOT be created, but administrators can edit or delete these computer objects there.
noticed by customer during workshop
noticed again during demonstration of UCS@School features for a prospect (school authority with 80 schools using only Linux clients)