Werk #6503: Fixed error handling for duplicate EC rule IDs.

Component Setup
Title Fixed error handling for duplicate EC rule IDs.
Date Sep 13, 2018
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.5.0p5 1.6.0b1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

Trying to insert an EC rule with an already existing ID resulted in a GUI crash, this has been fixed.

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