Werk #22129: Fix crash when saving a view with an empty joined column

Component

User interface

Title

Fix crash when saving a view with an empty joined column

Date

Aug 17, 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 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p36 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Saving a view crashed with a ValueError and an empty crash page if one of its columns was a Joined column whose of Service field had been left empty.

Instead of the crash, the view editor now marks the of Service field and asks you to fill it in, as it does for any other missing mandatory field.

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