HF: Fixes Local Heads not opening

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>tsp.headdb</groupId>
     <artifactId>HeadDB</artifactId>
-    <version>2.0</version>
+    <version>2.1</version>
     <packaging>jar</packaging>
 
     <name>HeadDB</name>

src/main/java/tsp/headdb/api/HeadAPI.java

@@ -190,7 +190,7 @@ public class HeadAPI {
      */
     public static List<LocalHead> getLocalHeads() {
         List<LocalHead> heads = new ArrayList<>();
-        for (String key : HeadDB.getPlayerdata().keySet()) {
+        for (String key : HeadDB.getPlayerdata().singleLayerKeySet()) {
             OfflinePlayer player = Bukkit.getOfflinePlayer(UUID.fromString(key));
             heads.add(new LocalHead(player.getUniqueId())
                     .withName(player.getName()));

src/main/resources/plugin.yml

@@ -2,7 +2,7 @@ name: HeadDB
 description: Database with thousands of heads
 
 main: tsp.headdb.HeadDB
-version: 2.0
+version: 2.1
 api-version: 1.16
 author: Silent