app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/Tournament.java

@@ -110,7 +110,11 @@ public class Tournament implements Serializable {
      * @throws PlaceExistsException if the place already exists
      */
     public void addPlace(Place newPlace) throws PlaceExistsException {
-        places.removeIf(place -> place.equals(newPlace));
+        for(Place place : places){
+            if(place.getName().equals(newPlace.getName())){
+                throw new PlaceExistsException("Place with same name exists already.");
+            }
+        }
         places.add(newPlace);
     }