Hi,
you should check which network is using the vlan xxx in neutron, if the network is not intended for octavia management, you should delete it or change a new vlan id for octavia. otherwise, you could try to stop creating management network in kolla deployment by the flowing steps:
I saw you perform a reconfigure action, so i assume you have an already worked cluster.
1. set octavia_auto_configure to false in you global.yaml.
2. set the flowing opts in gloabl.yaml
octavia_amp_image_owner_id: the value you can find in your exists config file(e.g. /etc/kolla/octavia-api/octavia.conf : amp_image_owner_id)
octavia_amp_boot_network_list : the vale of `amp_boot_network_list in octavia.conf
octavia_amp_secgroup_list: the value of `amp_secgroup_list` in octavia.conf
octavia_amp_flavor_id: the value of `amp_flavor_id ` in "octavia.config"
3. re-run reconfigure action.
thanks.