Why do two  Deco  E4R units on the same network have different firmware versions ? one has 1.1.1 build 20240104 rel 55043 while  the other has 1.6.1 build 20231227 rel53644 .In the Deco update section ,it shows "The systems up to date" .As a result of this issue  the second unit does not display  the "connection preference " option