I tried to migrate an offline VM from Server 2 to ESX 5, in the process I kept getting what seemed to be a snapshot error on a VM without snapshots. The VM would successfully migrate and then give this error on power up, or during the P2V Converter if I chose to remove snapshots.
“The parent virtual disk has been modified since the child was created. The content ID of the parent virtual disk does not match the corresponding parent content ID in the child.”
I tried about 7 times unsuccessfully to migrate the VM, then a friend suggested I modify the defaults of the P2V and choose HW version 7 instead of HW version 8, and this time it succeeded.