I have 2 units of Deco M9 Plus running very well in router mode.

But I found the local IP it assigned is not in the same range as my main router.

My main router always assigns 192.168.1.xxx.

But Deco M9 Plus router mode will assign 192.168.xxx.xxx to all my devices.

Thus I planning to change from router mode to AP mode.

But once I change it to AP mode, the network no longer works, until I turn off the child Deco and remain the main Deco.

Is there any configuration I should apply?