If you want to change of ID, you first need to “ask for leaving” the community. Your current identity won’t be able to receive certifications this way, and will end by being excluded.
Then you can ask certifications for your new identity, and join the community with it.
I would specify then I have to ask to the node / server / P2P network to join the community / currency through the client.
CuteCoin > “Community” > “Identities” > “Send membership demand”