Werk #4421: Host rename created a "parent rename" change for each existing host

Component	Setup
Title	Host rename created a "parent rename" change for each existing host
Date	Mar 1, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

When renaming a host via WATO, this created a change for each existing host. In large installations this lead to a performance issue.

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