Trying to set IBRS CPU family to cluster in RHV 4.1 and receive error

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Issue

Trying to set cluster CPU family to SandyBridge-IBRS and get error in the UI saying:
Error while executing action: Cannot change Cluster CPU to higher CPU type when there are active Hosts with lower CPU type.
-Please move Hosts with lower CPU to maintenance first.

Environment

Red Hat Virtualization 4.x

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