How to change the deviceArn (region) of a Seeed IOT AWS button

I have two SEEED IOT BUTTON FOR AWS, And they can be configure, but even if I change de AWS region, in the AWS IOT console the deviceArn for both buttons are the same and never changes, always shows up the us-west-2 region.

Can any body show me how to change that, because my account in AWS is pointing to east-1 region and could not test this device, my goal is test and then replace all AWS button with this one.

Thank you very much