Werk #19993: Fix crash when extending scheduled downtimes

Component

User interface

Title

Fix crash when extending scheduled downtimes

Date

May 18, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p4	Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Extending a host or service downtime from the Scheduled downtimes view — for example via the 30 minutes, One hour, Two hours or Custom time span buttons — produced a crash report and the downtime was not extended.

Extending downtimes now works again as expected.

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