Werk #12343: fix missing __id in folders after upgrade from 1.6.0

Component Core & Setup
Title fix missing __id in folders after upgrade from 1.6.0
Date Apr 28, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.0.0p4 2.1.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

When upgrading from 1.6.0 to 2.0.0 until 2.0.0p3, only the root-folder got assigned a __id key which is required for the folder endpoints of the REST API. Access to other folders with the REST API would result in a HTTP 500 error with an error message.

During the upgrade to 2.0.0p4, these folders will be fixed.

No further action (apart from upgrading) is necessary.

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