I have Anfenthaltstitel sticker visa and it not expire yet. I have exchanged to Sweden and I have to make a Sweden residence permit as the rule said. That means my German visa or Anfenthaltstitel is invalid or still valid. Since I still have a student position in German university as well as Anmeldung. Because I need to go to Iceland and my Sweden visa is expired. Can I enter Iceland with my Anfenthaltstitel?