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Re-registering a linked clone in vCenter Server changes the BIOS UUID of the linked clone (1013505)
Also, when a host is disconnected from and then reconnected to vCenter, the BIOS UUIDs of the virtual machines on that host are changed.
To resolve this issue, after unregistering a linked clone, restart vCenter Server before re-registering the linked clone.
If a host is disconnected, restart vCenter before reconnecting the host to preserve BIOS UUID of that host's virtual machines.
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