Unifi ap ac lite config not saved?

Question

System administration

Hello, I'm trying to set up a unifi ap ac lite point. Namely, you need to configure the static address mask and gateway, go via ssh to the default ip, edit the /tmp/system.cfg file, save: wq. Then I do
cfgmtd -f /tmp/system.cfg -w Then I do a reboot
and the settings go back to default. How to beat it? thank.