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Werk #20090: Support "Use new service names" setting in distributed setups with mixed versions

Component Setup
Title Support "Use new service names" setting in distributed setups with mixed versions
Date Jun 10, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0p8
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p32 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Werk #19411 changed the format of the global setting "Use new service names" (use_new_descriptions_for) from a list of plugins to a per-plugin mapping.

In a distributed setup where the central site has a version not containing the werk and a remote site has, the old format is synced to the remote site, leading to the error

AttributeError: 'list' object has no attribute 'get'

during the activation of changes. This error occurs only when the versions differ in the patch level, not between a 2.4 and 2.5.

With this werk the both formats are supported.

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