Werk #14351: Fix summary must be non empty crash when clustering services

Component	Checks & agents
Title	Fix summary must be non empty crash when clustering services
Date	Jun 9, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p3 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Some services lead to a crash with the exception "summary must not be empty" on a cluster host. This has been fixed. No user interaction required.

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