One of my decos is gnoring the connected Lan Cable and is connecting to a weak WLAN instead resulting in a bed connection in the Area. How can I convince it to use the LAN cable as data source?

Hello, I bought 4 Deco M4 Mesh WLAN devices, and they work well so far. After running a WPS WPA Tester & Wi-Fi Scanning app on my Android device, I realized that WPS in enabled on the Deco's. I was un