Container migration between Parallels Virtuozzo Container (PVC) nodes registered in Parallels Business Automation - Standard (PBA-S) fails with the error:
transport not specified
Source and destination nodes use different protocols: VZAgent 2.5 and VZAgent 4.6. Migration between nodes with different protocols is not allowed.
You can either upgrade the node that uses VZAgent 2.5 to the latest PVC version or install PVA 4.6 Agent on it in accordance with the following KB articles:
Note: that after the PVA 4.6 Agent installation on the node, you will have to re-register it in PBA-S setting VZAgent 4.6 as a protocol.