I want to change my external WebID

Self Host a Solid Pod
1

  1. I have created a Pod and have decided to use an existing external WebID.
    I want to change it.
    How can I do that ?

  2. with an external WebID the dispatched card profile is the one of the external WebID
    it seems strange.

  3. but worst for me the extended card profile /prefs.ttl is the one from the external WebID

It means the full profile of the external WebID is used.
I have 2 Pods with the same WebID for log in : fine
The datas can be different but the parameters /settings/ are the same (app parameters are for both Pod’s)

Is it the intent or a bug ?