diff --git a/src/main/java/de/fanta/challenges/Challenges.java b/src/main/java/de/fanta/challenges/Challenges.java
index d66d817..94980bf 100644
--- a/src/main/java/de/fanta/challenges/Challenges.java
+++ b/src/main/java/de/fanta/challenges/Challenges.java
@@ -176,7 +176,6 @@
             reloadConfig();
             saveConfig();
             this.backpack.clearConfig();
-            AllItemsChallenge.clearConfig();
             this.rndDrops.shuffleItems();
             this.rndDrops.saveItems();
             this.rndDrops.loadItems();
@@ -185,7 +184,6 @@
             this.rndDrops.loadItems();
             this.backpack.loadInventoryFromConfig();
             timer.setTime(getConfig().getInt("timertime"));
-            AllItemsChallenge.loadItems();
         }
 
         if (plugin.getServerType() == ServerType.ADVENTURE) {
@@ -222,9 +220,6 @@
             getConfig().set("showtimer", true);
         }
 
-        if (getConfig().getBoolean("allitems")) {
-            AllItemsChallenge.start();
-        }
         for (String string : getItemConfig().getStringList("items")) {
             try {
                 Material material = Material.valueOf(string);
@@ -241,6 +236,10 @@
             }
         }
 
+        if (getConfig().getBoolean("allitems")) {
+            AllItemsChallenge.start();
+        }
+
         if (serverType != ServerType.ADVENTURE) {
             for (@NotNull Iterator<Advancement> it = Bukkit.advancementIterator(); it.hasNext(); ) {
                 Advancement advancement = it.next();
@@ -282,7 +281,6 @@
             getConfig().set("backpack_size", backpack.getSize() / 9);
         } else {
             this.backpack.clearConfig();
-            AllItemsChallenge.clearConfig();
         }
         try {
             this.RndDropsConfig.save(this.RndDropsConfigFile);
@@ -348,11 +346,13 @@
 
     private void createAllItemsConfig() {
         this.AllItemsConfigFile = new File(getDataFolder(), "allitems.yml");
-        this.getAllItemsConfigFile().getParentFile().mkdirs();
-        saveResource("allitems.yml", true);
+        if (!AllItemsConfigFile.exists()) {
+            this.getAllItemsConfigFile().getParentFile().mkdirs();
+            saveResource("allitems.yml", true);
+        }
         this.AllItemsConfig = new YamlConfiguration();
         try {
-            this.AllItemsConfig.load(this.getAllItemsConfigFile());
+            this.AllItemsConfig.load(this.AllItemsConfigFile);
         } catch (IOException | org.bukkit.configuration.InvalidConfigurationException e) {
             e.printStackTrace();
         }
diff --git a/src/main/java/de/fanta/challenges/challenges/AllItemsChallenge.java b/src/main/java/de/fanta/challenges/challenges/AllItemsChallenge.java
index 6a64b29..7533758 100644
--- a/src/main/java/de/fanta/challenges/challenges/AllItemsChallenge.java
+++ b/src/main/java/de/fanta/challenges/challenges/AllItemsChallenge.java
@@ -23,18 +23,27 @@
     public static int ItemScheduler;
     public static BossBar bossBar;
     public static Material item;
-    public static List<String> items = new ArrayList<>();
+    public static List<Material> foundItems = new ArrayList<>();
+    public static List<Material> itemsToSearch = new ArrayList<>();
 
     private static final Challenges plugin = Challenges.getPlugin();
 
     private static int itemcount = 0;
-    private static boolean itemcountboolean = false;
 
     public static void start() {
-        if (items.isEmpty()) {
+        if (foundItems.isEmpty()) {
+            loadItems();
+        }
+
+        if (itemsToSearch.isEmpty()) {
             for (Material mat : Material.values()) {
-                if (mat.isItem() && !mat.isAir() && !plugin.getNotAvailableMaterials().contains(mat))
-                    items.add(mat.toString());
+                if (mat.isItem() && !mat.isAir() && !plugin.getNotAvailableMaterials().contains(mat)) {
+                    itemcount++;
+
+                    if (!foundItems.contains(mat)) {
+                        itemsToSearch.add(mat);
+                    }
+                }
             }
         }
 
@@ -45,10 +54,10 @@
 
         if (item == null) {
             Random r = new Random();
-            item = Material.valueOf(items.get(r.nextInt((items.size() - 1) + 1)));
-
+            item = itemsToSearch.get(r.nextInt((itemsToSearch.size() - 1) + 1));
             Config.setValue("allitemscurrentitem", new ItemStack(item));
         }
+
         bossBar = Bukkit.createBossBar("", BarColor.GREEN, BarStyle.SOLID);
         bossBar.setVisible(true);
         for (Player pl : Bukkit.getOnlinePlayers()) {
@@ -60,7 +69,7 @@
     public static void update() {
         ItemScheduler = Bukkit.getScheduler().scheduleSyncRepeatingTask(Challenges.getPlugin(), () -> {
             if (Config.getBoolean("allitems") && Challenges.getPlugin().getTimer().isRunning()) {
-                if (items.size() != 0) {
+                if (itemsToSearch.size() != 0) {
                     for (Player pp : Bukkit.getOnlinePlayers()) {
                         bossBar.addPlayer(pp);
                         if (pp.getInventory().contains(item)) {
@@ -68,16 +77,9 @@
                         }
                     }
 
-                    if (!itemcountboolean) {
-                        for (Material mat : Material.values()) {
-                            if (mat.isItem() && !mat.isAir() && !plugin.getNotAvailableMaterials().contains(mat))
-                                itemcount++;
-                        }
-                        itemcountboolean = true;
-                    }
-
-
-                    bossBar.setTitle(ChatUtil.GREEN + "Item » " + ChatUtil.BLUE + item.toString().replace("_", " ") + ChatUtil.BLUE + " (" + ChatUtil.GREEN + (itemcount - items.size()) + "/" + itemcount + ChatUtil.BLUE + ")");
+                    bossBar.setTitle(ChatUtil.GREEN + "Item » " + ChatUtil.BLUE + item.toString().replace("_", " ") + ChatUtil.BLUE + " (" + ChatUtil.GREEN + foundItems.size() + "/" + itemcount + ChatUtil.BLUE + ")");
+                    double progress = foundItems.size() * 100.0 / itemcount / 100.0;
+                    bossBar.setProgress(progress);
                 } else {
                     bossBar.setTitle(ChatUtil.GREEN + "Alle Items gesammelt!");
                     ChatUtil.sendBrodcastMessage("Alle Items gesammelt!");
@@ -95,27 +97,30 @@
 
     public static void next(Player p, Boolean skipped) {
         Material old = item;
-        items.remove(old.toString());
-        if (items.size() != 0) {
+        itemsToSearch.remove(old);
+        foundItems.add(old);
+        saveItems();
+        if (itemsToSearch.size() != 0) {
             Random r = new Random();
-            item = Material.valueOf(items.get(r.nextInt((items.size() - 1) + 1)));
+            item = itemsToSearch.get(r.nextInt((itemsToSearch.size() - 1) + 1));
             Config.setValue("allitemscurrentitem", new ItemStack(item));
             if (skipped) {
                 ChatUtil.sendBrodcastMessage("Item: " + ChatUtil.BLUE + old.toString().replace("_", " ") + ChatUtil.GREEN + " wurde von " + p.getName() + " übersprungen.");
             } else {
                 ChatUtil.sendBrodcastMessage("Item: " + ChatUtil.BLUE + old.toString().replace("_", " ") + ChatUtil.GREEN + " wurde von " + p.getName() + " Registriert.");
             }
-            ChatUtil.sendBrodcastMessage("Neues Item: " + ChatUtil.BLUE + item.toString().replace("_", " ") + ChatUtil.GREEN + " (Es fehlen noch " + ChatUtil.BLUE + (items.size()) + ChatUtil.GREEN + " Items)");
+            ChatUtil.sendBrodcastMessage("Neues Item: " + ChatUtil.BLUE + item.toString().replace("_", " ") + ChatUtil.GREEN + " (Es fehlen noch " + ChatUtil.BLUE + (foundItems.size()) + ChatUtil.GREEN + " Items)");
             for (Player pp : Bukkit.getOnlinePlayers()) {
                 pp.playSound(pp.getLocation(), Sound.BLOCK_NOTE_BLOCK_PLING, 1, 1);
             }
         }
     }
 
-    public static void saveItems() {
-        clearConfig();
+    private static void saveItems() {
         FileConfiguration config = Challenges.getPlugin().getAllItemsConfig();
-        Config.setValue("items", items);
+        ArrayList<String> itemStings = new ArrayList<>();
+        foundItems.forEach(material -> itemStings.add(material.name()));
+        config.set("items", itemStings);
         try {
             Challenges.getPlugin().AllItemsConfig.save(Challenges.getPlugin().getAllItemsConfigFile());
         } catch (IOException e) {
@@ -123,15 +128,10 @@
         }
     }
 
-    public static void loadItems() {
-        items.clear();
+    private static void loadItems() {
         FileConfiguration config = Challenges.getPlugin().getAllItemsConfig();
         if (config.isList("items")) {
-            items.addAll(config.getStringList("items"));
+            config.getStringList("items").forEach(itemSting -> foundItems.add(Material.valueOf(itemSting)));
         }
     }
-
-    public static void clearConfig() {
-        Challenges.getPlugin().getAllItemsConfigFile().delete();
-    }
 }
diff --git a/src/main/java/de/fanta/challenges/utils/SaveWorldUtils.java b/src/main/java/de/fanta/challenges/utils/SaveWorldUtils.java
index 8ce315a..0f1a243 100644
--- a/src/main/java/de/fanta/challenges/utils/SaveWorldUtils.java
+++ b/src/main/java/de/fanta/challenges/utils/SaveWorldUtils.java
@@ -36,7 +36,6 @@
             Challenges.getPlugin().getConfig().set("backpack_size", Challenges.getPlugin().getBackpack().getSize() / 9);
             Challenges.getPlugin().saveConfig();
             Challenges.getPlugin().getBackpack().saveInventoryToConfig();
-            AllItemsChallenge.saveItems();
             World world_world = Bukkit.getWorlds().get(0);
             World world_nether = Bukkit.getWorlds().get(1);
             World world_end = Bukkit.getWorlds().get(2);