RAK 7243 the same gateway id as before

I am using RAK7243 gateway, before today I was using another RAK7243 gateway and everything was working fine, today I used a new gateway to configure on the same windows system according to the previous steps, but I found that the new gateway Id is the same as before, as far as I know the ID of each gateway is different, how should I change it? Does the current situation affect the normal use?