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Werk #22176: Fix crash on the schedule downtime form

Component User interface
Title Fix crash on the schedule downtime form
Date Aug 18, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
3.0.0b1
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p12 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Opening the "Schedule downtime" command form crashed with OverflowError: timestamp out of range for platform time_t when one of the configured downtime duration presets had a duration so long that its end date could not be represented by the operating system.

Such a preset is now left out of the list of duration buttons, so the form opens again and the remaining presets can be used. The presets are configured under the global setting "Downtime duration presets".

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