In the description it does explain that you only need the initiator_name or initiator_address and the new members in the preseed file.
However, in the first preseed example (with full description and details) has still the first existing node, so it is a bit confusing.
I believe the following should be removed from the example.
- name: micro01
address: 10.0.0.1
ovn_uplink_interface: eth1
ovn_underlay_ip: 10.0.2.101
In the description it does explain that you only need the initiator_name or initiator_address and the new members in the preseed file.
However, in the first preseed example (with full description and details) has still the first existing node, so it is a bit confusing.
I believe the following should be removed from the example.