I just noticed that when I created a CDK server adapter, then deleted and they tried to create a new one, on the second page of the New Server wizard, my username was already selected (that's expected) and the Folder was empty, but I could still press Finish to create the server. And then when I went to the server editor to check if it's really empty there and it actually contains the path from my previously deleted server.
So something is odd here.