twc

Hi, I don't understand why I received TWC, but the message said that the ip address was duplicated. I think this ip duplication could have happened because I lived with a friend a one and half year ago and we sometimes used the same network until he bought a own one. So it could be that he was connected to sythe with the internet I am now using. We haven't lived together for about half a year now, and I recently formed a sythe and got a TWC alert, so maybe there is a way to solve this problem?