UCS 5 Update-Problem

I updated my UCS Core Edition from 4.4 to 5.0, it works without problems. After this i would upgrade to the last version but i got this message:

Checking required_ucsschool_version … Traceback (most recent call last):
File “”, line 7, in
AttributeError: ‘NoneType’ object has no attribute ‘is_installed’
Checking role_package_removed … OK
Checking slapd_on_member … OK
Checking ssh … OK
Checking system_date_too_old … OK
Checking term … OK
Checking valid_machine_credentials … OK

The system can not be updated to UCS 5.0 due to the following reasons:

UCS@school is installed. To upgrade to UCS 5.0-2 as least UCS@school 5.0 v2 is required.
Please upgrade the UCS@school app first!

Error: Update aborted by pre-update script of release 5.0-2
How can i change to my former Edition back?


And this is not working?


I dont use UCS@School! I use “UCS Core Edition”.
There isnt any school app in my installation.
Idont understand this, but in my testinstallation there is the same test!

Starting pre-update-checks-5.0-2 (Do 1. Sep 20:43:24 CEST 2022):
Checking disk_space … OK
Checking failed_ldif … OK
Checking hold_packages … OK
Checking ldap_connection … OK
Checking ldap_schema … OK
Checking master_version … OK
Checking minimum_ucs_version_of_all_systems_in_domain … OK
Checking overwritten_umc_templates … OK
Checking package_status … OK
Checking required_ucsschool_version … OK
Checking role_package_removed … OK
Checking slapd_on_member … OK
Checking system_date_too_old … OK
Checking valid_machine_credentials … OK

Where can i deaktivate the not installed school apps?



you might have used ucs@school once. Try to make sure it is not installed. Or try to install and remove afterwards.

See this article about ssome related steps.

Use univention-app to install and remove.



Thanks for your help. In the Archiv-Cache was the ucs@school information. After delete, the update was working!

1 Like