Getting an EVC related error on 5 VMs that I cant live migrate off of a host

Hi all, I have migrated 40 VMs off of a host in a cluster with no issues. 5 VMs however are showing this error: ‘ The target host does not support the virtual machine’s current hardware requirements.’. The host I am coming from is an Intel Gold 6200 Skylake gen CPU. The host I am going to is an Intel 6100 Skylake gen CPU. I do not have EVC mode enabled. Does anyone know what could be the issue?

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  1. If EVC is off, 6200 is cascade lake and has some CPU features not in Skylake- mostly around Spectre/Meltdown/L1TF mitigation and AVX512VNNI You’ll need to cold migrate those machines.

  2. What version of ESXi is running on each host? Maybe the VM hardware version is either too new or too old. You can also get this error by trying to migrate between similar versions where the source host has the CPU microcode updates and the destination does not.

  3. I had an issue migrating some VMs from apparently identical hosts. I enabled EVC mode and then I could migrate them.

    Can you enable EVC so that you can migrate them?

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