• https://help.ubnt.com/hc/en-us/articles/115000263008--UniFi-Understanding-PoE-and-How-UniFi-Devices-are-Powered

• https://help.ui.com/hc/en-us/articles/360043360253-UniFi-Recovery-Mode

• https://community.ui.com/questions/UniFi-FAQ-the-missing-manual-and-beyond/110f3e4a-9994-42b3-a7f0-1ef1eb55c093

Failed saving network „9 Net”. IP Addresses „192.168.0.2” are used in network „0 Home”. (msg: api.err.WanIpUsedAsNatOutbound)

I solved this problem. I have upgraded to 1.9.0. To change the WAN IP you need to add an additional IP address to the WAN interface. Then change the address in the Network / LAN / Advanced tab „Internet Source IP” to which the NAT is performed. Only then can the Primary WAN IP Address be changed. community.ui.com