diff --git a/DataStructures.cs b/DataStructures.cs
index 2cd12a5..7228577 100644
--- a/DataStructures.cs
+++ b/DataStructures.cs
@@ -11,6 +11,13 @@ public class KasAddressList //Address-Set
     {
         KasPersons = new List<KasPerson>();
         Name = name;
+        foreach (var set in Settings._instance.addressSets.addresses)
+        {
+            if (Name == set.Name)
+            {
+                Name = name + "-new";
+            }
+        }
         var highest = 0;
         foreach (var k in Settings._instance.addressSets.addresses)
             if (highest <= k.ID)