Error: command failed: Cannot migrate Vserver "vserver_name" because SMB1 is enabled on the Vserver. Use the (privilege: advanced) "cifs options modify -vserver vserver_name -smb1-enabled false" command to disable SMB1, then try the operation again.
But CIFS is not even enabled on this vserver:
# cifs options modify -vserver vserver_name -smb1-enabled false
Error: command failed: Failed to get CIFS server. Reason: entry doesn't exist.
# cifs server show -vserver vserver_name
There are no entries matching your query.
# vserver show -vserver vserver_name -fields disallowed-protocols
vserver disallowed-protocols
vserver_name cifs,fcp,iscsi,ndmp,nvme
ONTAP version on both source and destination cluster: 9.15.1P3