Werk #12283: Service discovery page: Do not fail in case of unknown manual check rules

Component Setup
Title Service discovery page: Do not fail in case of unknown manual check rules
Date Mar 4, 2021
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 2.0.0 2.1.0b1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

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