According to vRanger 6.x installation guide "The virtual machine hardware cannot be downgraded during replication. For example, a VM with hardware version 8 on an ESX 5 host cannot be replicated to an ESX 4 host, as the VM hardware level is not supported by the target host."
Therefore this operation is not supported due to VMware virtual hardware limitation.
Replication should be performed between hosts that use same virtual hardware versions.
