Change wifi network on v3 hub

How to change wifi network on the v3 hub? Just got mesh wifi and want to change the v3 hub to that network to disable the old hub wireless and cannot change, I go to change wireless information, follow the instructions and the light blinks yellow for some seconds and goes back to green and don’t give time to scan the QR code and change the network. I think I did a network change some months back and now cannot change. What can I do to change to the new network?
Thanks.

Did that , it blink orange or yellow and when I go to scan the QR the led goes to green, I scan the QR but it fails to pass to the next step.