diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/BukkitItemManager.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/BukkitItemManager.java
index 39c1f336c..434b2d978 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/BukkitItemManager.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/BukkitItemManager.java
@@ -365,9 +365,10 @@ public class BukkitItemManager extends AbstractItemManager<ItemStack> {
         return null;
     }
 
+    @Nullable
     private ItemStack createVanillaItemStack(Key id) {
         Object item = FastNMS.INSTANCE.method$Registry$getValue(MBuiltInRegistries.ITEM, KeyUtils.toResourceLocation(id));
-        if (item == null) {
+        if (item == null || item == MItems.AIR) {
             return null;
         }
         return FastNMS.INSTANCE.method$CraftItemStack$asCraftMirror(FastNMS.INSTANCE.constructor$ItemStack(item, 1));
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/recipe/BukkitRecipeConvertor.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/recipe/BukkitRecipeConvertor.java
deleted file mode 100644
index c899ca4df..000000000
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/item/recipe/BukkitRecipeConvertor.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package net.momirealms.craftengine.bukkit.item.recipe;
-
-import net.momirealms.craftengine.core.item.recipe.Recipe;
-import net.momirealms.craftengine.core.util.Key;
-import org.bukkit.inventory.ItemStack;
-
-public interface BukkitRecipeConvertor<T extends Recipe<ItemStack>> {
-
-    Runnable convert(Key id, T recipe);
-}