Hello! I am trying to set a password on the extended network when the main network does not have a password. The app does not allow this and says that the main and extended network passwords must to be the same.

is there any way around that?

I am hoping to set up a smart device but the device requires the network to have a password. Since the owner of the network would rather not have a password on their network, I figured I would use this RE450 extender to both give me better signal downstairs and also allow my robot vacuum to work. 
 

Worst case scenario, I can ask the owner to set a password and help change over his tech and smart devices, but we both agreed that we'd rather not do that.