1 Veyon Master PC, 3 Private Keys and 3 Public Keys

[chinmi]

So I just tried veyon, works well with 1 veyon master, 1 private keys, and 1 public keys copied to 4 class A PC
Problems started when I try to have different keys for different class
So i tried making 3 set of keys.
ClassA.Keys (Priv and Pub)
ClassB.Keys (Priv and Pub)
ClassC.Keys (Priv and Pub)

I keep A B C private keys on master veyon PC
and distribute the public keys to it's corresponding class and pc
ClassA.Keys Pub to 6 student pc in class A, and ClassA.Keys Priv to 1 teacher pc
ClassB.Keys Pub to 6 student pc in class B, and ClassB.Keys Priv to 1 teacher pc
ClassC.Keys Pub to 6 student pc in class C, and ClassC.Keys Priv to 1 teacher pc

the teacher pc can see all the pc in it's coresponding class
but the master pc cannot see all A B C class pc
but if i only keep 1 private keys on master pc (for example i keep A private keys and delete B C private keys) i can see the corresponding class student pc from master pc

what did i do wrong?

[chinmi]

nvm, i think i solved it.
now master pc can see and control all building wide teacher and student pc. and teacher can only see and control student pc in it's class