Werk #10170: BI: Fix exception in BI status GUI when loading configs created with 1.4 or older

Component	BI
Title	BI: Fix exception in BI status GUI when loading configs created with 1.4 or older
Date	Sep 21, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

An exception like "unhashable type 'list'" could appear when opening BI views while the BI configuration was created in 1.4 or older.

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