[Libguestfs] why virt-v2v in-place option not support in centos 7?

Hi All, As the in-place help said, --in-place Do not create an output virtual machine in the target hypervisor. Instead, adjust the guest OS in the source VM to run in the input hypervisor. This mode is meant for integration with other toolsets, which take the responsibility of converting the VM configuration, providing for rollback in case of errors, transforming the storage, etc. I want to do v2v modifications in the source disk image, but the v2v give the error: virt-v2v -v -x -i disk /dev/vdh --in-place virt-v2v: error: --in-place cannot be used in RHEL 7 could any one give me some help? why —in-place option disabled in RHEL7, is there a older version enabled this feture? Thanks very much for help! Best Wishes.