Dnsmasq - Router name resolves to two IPs

I have a minor issue that I'd like to resolve.

First, my setup...

Cudy WR3000v1
OpenWrt 25.12.2
dnsmasq 2.91-r2

Wan is PPPoE
Two LAN interfaces, one VLAN enabled, both bridged to Ethernet ports and Wi-Fi
L2TP/ipsec VPN for remote access

All this works well without issue - except issues resolving the host name for the router via VPN.

My router name is set to 'Lounge'. When this name is pinged via a host on main LAN it always resolves correctly.

When pinged from a client connected via the VPN the resolution round robins between the main LAN IP and the VLAN IP.

I note that the file dhcp.cfg01411c under /var/hosts contains...

auto-generated config file from /etc/config/dhcp

172.20.60.1 Lounge
172.20.61.1 Lounge

Question is - how do I prevent the second entry related to the VLAN from being auto generated?

Thanks.

Play with the add_local_hostname and/or add_local_fqdn options in the dhcp config.