Werk #13234: Fix validation of label keys in ruleset conditions

Component GUI
Title Fix validation of label keys in ruleset conditions
Date Sep 6, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.0.0p10 2.1.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

If several keys were used for label conditions in rulesets, e.g. "foo:bar" and "foo:baz", the first label was silently overwritten by the last label.

You will now get an error message if keys are used twice.

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