Backup is successful but replication is keep fail with the error “The Operation is not allowed in the current state”
Because the replication will create the same compatibility version on target, however, the target VMware version is older than the source VMware Guest, so the replication will not succeed.
Source VM Guest
Target VMware Version
– The Source VM compatibility need to create ESXi 6.5 not over the Target version
– Target Server upgrade to VMware ESXi 7.0 U2 or later
Veeam Knowledge Base https://www.veeam.com/kb3000