My Godfather is on Earth.

I am in space.

It doesn't let me change because of that?

No offense to my original Godfather, he just ain't doin' shit for me.

I need a new one & found one who has already got my back on a few occasions.

So why can't I switch?

If you are not satisfied with your Godfather, then every 7 days you have the opportunity to end your relationship with your current Godfather and search for a new one.

Read the fucking manual:D

Is it only on the 7th day?

I tried on day 8.