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Werk #18363: REST API no longer automatically migrates deprecated rule values

Component REST API
Title REST API no longer automatically migrates deprecated rule values
Date Sep 10, 2025
Level Trivial Change
Class New Feature
Compatibility Incompatible - Manual interaction might be required
Checkmk versions & editions
2.5.0b1
Not yet released
Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

In earlier versions, the REST API also accepted obsolete parameters from rules. These parameters were automatically migrated to the newer version. The problem was that the client was not informed about what was actually written to the hard drive. During a migration there was always a risk of newly introduced or deprecated fields.

This change requires the REST API client to use the latest known data format for the rule. If the endpoint receives deprecated data, it reports an error.

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