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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
2.6.0b1
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p6
Not yet released
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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