Werk #18585: Dashboards: Fix migration of view widgets with missing optional fields

Component

User interface

Title

Dashboards: Fix migration of view widgets with missing optional fields

Date

Apr 2, 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
2.5.0b3	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Previously, migrating old view widgets to the new embedded view format could fail with a KeyError if the stored dashboard configuration was missing optional fields such as group_painters, browser_reload, num_columns, column_headers, or sorters.

These fields now fall back to their default values during migration, so older configurations are handled gracefully.

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