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Getting error 21502 attempting live migration between identical hosts.

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Trying to live migrate between hosts. All hosts in cluster are running identical hardware, bought at the same time and have been functioning properly for months.

I am able to migrate 52 of the VMs without trouble. Two of them refuse to move from their current host. The VMs have the same VM additions levels as ones that migrate and resources aren't an issue on the destination server. Migration settings are the same between hosts and cluster validation comes back with no obvious issues in processor config.

Any ideas on where I need to look next?

Full error details:

Live migration of 'Virtual Machine VirtualServer1' failed.

Virtual machine migration operation for 'VirtualServer1' failed at migration destination 'Host1'. (Virtual machine ID )

The virtual machine 'VirtualServer1' is using processor-specific features not supported on physical computer 'Host1'. To allow for migration of this virtual machine to physical computers with different processors, modify the virtual machine settings to limit the processor features used by the virtual machine. (Virtual machine ID )


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