Werk #19352: Custom graph editor: Allow empty symbol for custom units

Component

User interface

Title

Custom graph editor: Allow empty symbol for custom units

Date

May 22, 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
2.5.0p6	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Werk #19347 introduced a validation that rejected an empty unit notation symbol for non-time custom-unit notations in the Custom graph editor. The symbol of a custom unit is optional, however (for example for dimensionless metrics), so that validation was incorrect.

The check has been removed; empty symbols are again accepted for non-time custom-unit notations. The other validations introduced by werk #19347 (precision digits, constant graph line value, transformation percentile) remain in place.

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