Guest wifi network

[ChrMen]

I just configured a P1 Pro security camera. I want the camera to use my guest network at home. But the camera network is changing everytime I change the wifi network on my phone. And when I change it back to my guest network, it changes my phone wifi network at the same time. What do I need to do so that the camera and my phone do not use the same wifi network? I do not want the camera to have access to my entire home network. In reality, the camera only needs internet access, I do not understand why it has to use the same network as my phone.