Werk #13240: Fix disabling of vanished services in service discovery

Component	Setup
Title	Fix disabling of vanished services in service discovery
Date	Sep 10, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p12 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0p26 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Using the option "Move to disabled services" on vanished services had no effect.

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