diff --git a/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/db/DbCollectionDAO.java b/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/db/DbCollectionDAO.java
index d1ae0e8cb..b7720c858 100644
--- a/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/db/DbCollectionDAO.java
+++ b/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/db/DbCollectionDAO.java
@@ -234,7 +234,7 @@ public class DbCollectionDAO implements CollectionDAO {
 
     public void convertCollection(int playerId, String type) throws SQLException, IOException {
         MutableCardCollection oldCollection = getOldPlayerCollection(playerId, type);
-        var oldinfo = oldCollection.getExtraInformation();
+        var oldinfo = new HashMap<String, Object>(oldCollection.getExtraInformation());
         oldinfo.put(DefaultCardCollection.CurrencyKey, oldCollection.getCurrency());
         oldCollection.setExtraInformation(oldinfo);
         overwriteCollectionContents(playerId, type, oldCollection, "Initial Convert");