Werk #12697: Fix problem with removing acknowledgements

Component Core & Setup
Title Fix problem with removing acknowledgements
Date Sep 27, 2021
Checkmk Editon Checkmk Enterprise (CEE)
Checkmk Version 2.1.0i1 2.0.0p12
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

If the comment to an acknowledgement was removed first, for example, from the "Monitor | Comments" menu, the acknowledgement would stick and could not be removed anymore.

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