Werk #13869: Fix error on editing of timeperiods

Component Setup
Title Fix error on editing of timeperiods
Date Mar 28, 2022
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0b5 2.2.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

If timeperiods were edited, the error "This name is already being used by another timeperiod." occurred.

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