Migrate OpenVZ CT to ProxMox (ploop problem ...) ?

Hi,

I've several OpenVz CT actually working on OpenVZ Host (not ProxMox). These CT use ploop layout. When i try to migrate to ProxMox whith "vzmigrate" i get this error : "Destination node don't support ploop, can't migrate". I think it's normal because ProxMox don't seem to support ploop.

Do you think there is a method to convert containers currently running ploop storage mode to normal OpenVZ storage layout ?

Thanks in advance for your help !

/Xavier