How to change hostapd IP (always 192.168.8.1)

How to change default IP for hostapd ?

I read:

and use default
/etc/hostapd.conf

interface=uap0
ssid=access-point
hw_mode=g
channel=1
own_ip_addr=192.168.8.1

/etc/systemd/network/hostapd.network

[Match]
Name=wlan0 uap0
WLANInterfaceType=ap

[Network]
Address=192.168.8.1/24
DHCPServer=true
IPMasquerade=yes
IPForward=ipv4

[DHCPServer]
PoolOffset=100
PoolSize=20
EmitDNS=yes
DNS=9.9.9.9

It works OK !

If I change IP to 192.168.18.1

/etc/hostapd.conf

interface=uap0
ssid=access-point
hw_mode=g
channel=1
own_ip_addr=192.168.18.1

/etc/systemd/network/hostapd.network

[Match]
Name=wlan0 uap0
WLANInterfaceType=ap

[Network]
Address=192.168.18.1/24
DHCPServer=true
IPMasquerade=yes
IPForward=ipv4

[DHCPServer]
PoolOffset=100
PoolSize=20
EmitDNS=yes
DNS=9.9.9.9

In files I have 192.168.18.1
But Linux has always 192.168.8.1

It is BUG or feature ?

I found the culprit: hostapd-example.bb
it add hostapd-example.network to image and here is 192.168.8.1 IP