It is a known limitation of Parallels Containers version 4.7. Online migration (using `--online
` flag for `vzmigrate
` command) is not supported if the source node is installed with the Parallels Containers version 3.0. Once you try it, it will fail with the below error:
Can't move/copy VE#101 -> VE#101, ,  : Can not perform online migration to/from elder version
As a possible workaround, consider either performing the offline migration or using the intermediate node installed with the Parallels Containers version 4.0 or 4.6.