Werk #16728: Allow dashes in custom tag groups

Component	Setup
Title	Allow dashes in custom tag groups
Date	Jun 2, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p3 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

A recent change prohibited the use of hyphens in tags and auxiliary tags, causing failures in instances that already contained tags with hyphens. This change reverses that behaviour and hyphens are now permitted again.

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