Questions about migration from NS7 to NS8


i am sorry but it is the same as before, which kind of a protocol could be helpful? What i did is install Rocky 9.5 from scratch to a new VM on Proxmox. After that i installed the NS8 from the Installation Guide NS8. After that i did an reboot and start the migration on NS7. It connect to the NS8 Cluster and i click Migration, after that i start the the migration to ns8 and got the Error migrating data message. if i look at the NS8 i got installed Mail and imapsync but not more.