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Werk #19493: downtimes: deleting downtimes by hostgroup should match on the exact hostgroup

Component REST API
Title downtimes: deleting downtimes by hostgroup should match on the exact hostgroup
Date Mar 24, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.6.0b1
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.5.0b2
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.4.0p26
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Downtime deletion by hostgroup previously matched hostgroups containing the specified "hostgroup_name" rather than matching the exact name. For example, deleting the downtime for 'hostgroup_A' also deleted downtimes for 'hostgroup_A_Z', causing incorrect deletions. We now match hostgroup names exactly, which corrects this behavior.

As a result, users will only delete downtimes for the exact hostgroup they specify, preventing accidental removal of downtimes for similarly named hostgroups. No action is required from users to benefit from this fix.

No script changes are necessary.

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