Update ItemData.java

Author: sovdeeth

src/main/java/ch/njol/skript/aliases/ItemData.java

@@ -11,7 +11,6 @@
 import ch.njol.yggdrasil.YggdrasilSerializable.YggdrasilExtendedSerializable;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
-import org.bukkit.NamespacedKey;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
 import org.bukkit.block.data.BlockData;
@@ -565,7 +564,7 @@ public boolean matchPlain(ItemData other) {
 	@Override
 	public Fields serialize() throws NotSerializableException {
 		Fields fields = new Fields(this); // ItemStack is transient, will be ignored
-		fields.putObject("key", type.getKey());
+		fields.putObject("key", type.getKey().toString());
 		fields.putObject("meta", stack != null ? stack.getItemMeta() : null);
 		return fields;
 	}
@@ -575,10 +574,10 @@ public Fields serialize() throws NotSerializableException {
 	@Override
 	public void deserialize(Fields fields) throws StreamCorruptedException, NotSerializableException {
 		if (fields.hasField("key")) {
-			NamespacedKey key = fields.getAndRemoveObject("key", NamespacedKey.class);
+			String key = fields.getAndRemoveObject("key", String.class);
 			if (key == null)
 				throw new StreamCorruptedException("Material key is null");
-			this.type = Material.matchMaterial(key.toString());
+			this.type = Material.matchMaterial(key);
 		} else {
 			// attempt back compat deserialization, though using ordinals is not reliable
 			this.type = materials[fields.getAndRemovePrimitive("id", int.class)];