diff --git a/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/game/formats/DefaultLotroFormat.java b/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/game/formats/DefaultLotroFormat.java
index 814cafc5d..7a855f367 100644
--- a/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/game/formats/DefaultLotroFormat.java
+++ b/gemp-lotr/gemp-lotr-server/src/main/java/com/gempukku/lotro/game/formats/DefaultLotroFormat.java
@@ -486,7 +486,11 @@ public class DefaultLotroFormat implements LotroFormat {
 
     @Override
     public List<String> findBaseCards(String bpID) {
-        return _errataCardMap.values().stream().filter(x-> x.equals(bpID)).toList();
+        return _errataCardMap
+                .entrySet().stream()
+                .filter(x-> x.getValue().equals(bpID))
+                .map(x -> x.getKey())
+                .toList();
     }
 
     private String validateDeckStructure(LotroDeck deck) {