diff --git a/common/src/main/java/cx/rain/mc/nbtedit/gui/NBTEditGui.java b/common/src/main/java/cx/rain/mc/nbtedit/gui/NBTEditGui.java
index b59b01f..60e0777 100644
--- a/common/src/main/java/cx/rain/mc/nbtedit/gui/NBTEditGui.java
+++ b/common/src/main/java/cx/rain/mc/nbtedit/gui/NBTEditGui.java
@@ -20,6 +20,7 @@
 import net.minecraft.client.gui.components.Button;
 import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.client.resources.sounds.SimpleSoundInstance;
+import net.minecraft.nbt.CollectionTag;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.ListTag;
 import net.minecraft.nbt.Tag;
@@ -304,11 +305,22 @@ private void copySelected() {
             }
 
             setFocused(focused);
+        } else {
+            Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
         }
     }
 
     private void paste() {
+        var focused = getFocused();
+
         if (focused != null) {
+            var tag = focused.getTag();
+            if (!(tag instanceof CompoundTag)
+                    && !(tag instanceof CollectionTag<?>)) {
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
+                return;
+            }
+
             var node = NBTEdit.getInstance().getClient().getClipboard();
             if (node != null) {
                 focused.setShowChildren(true);
@@ -328,6 +340,8 @@ private void paste() {
                 setFocused(node);
                 update(true);
             }
+        } else {
+            Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
         }
     }
 
@@ -591,28 +605,44 @@ public boolean onKeyPress(int keyCode, int scanCode, int modifiers) {
         }
 
         if (keyCode == GLFW.GLFW_KEY_C && modifiers == GLFW.GLFW_MOD_CONTROL) {
-            copySelected();
-            updateButtons();
-            Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            if (getFocused() != null) {
+                copySelected();
+                updateButtons();
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            } else {
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
+            }
         }
 
         if (keyCode == GLFW.GLFW_KEY_V && modifiers == GLFW.GLFW_MOD_CONTROL) {
-            paste();
-            updateButtons();
-            Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            if (getFocused() != null) {
+                paste();
+                updateButtons();
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            } else {
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
+            }
         }
 
         if (keyCode == GLFW.GLFW_KEY_X && modifiers == GLFW.GLFW_MOD_CONTROL) {
-            copySelected();
-            deleteSelected();
-            updateButtons();
-            Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            if (getFocused() != null) {
+                copySelected();
+                deleteSelected();
+                updateButtons();
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            } else {
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
+            }
         }
 
         if (keyCode == GLFW.GLFW_KEY_D && modifiers == GLFW.GLFW_MOD_CONTROL) {
-            deleteSelected();
-            updateButtons();
-            Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            if (getFocused() != null) {
+                deleteSelected();
+                updateButtons();
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.UI_BUTTON_CLICK, 1));
+            } else {
+                Minecraft.getInstance().getSoundManager().play(SimpleSoundInstance.forUI(SoundEvents.VILLAGER_NO, 1));
+            }
         }
 
         return false;
diff --git a/common/src/main/java/cx/rain/mc/nbtedit/gui/screen/NBTEditScreen.java b/common/src/main/java/cx/rain/mc/nbtedit/gui/screen/NBTEditScreen.java
index 8aa00da..1502d68 100644
--- a/common/src/main/java/cx/rain/mc/nbtedit/gui/screen/NBTEditScreen.java
+++ b/common/src/main/java/cx/rain/mc/nbtedit/gui/screen/NBTEditScreen.java
@@ -1,6 +1,5 @@
 package cx.rain.mc.nbtedit.gui.screen;
 
-import com.mojang.blaze3d.vertex.PoseStack;
 import cx.rain.mc.nbtedit.NBTEdit;
 import cx.rain.mc.nbtedit.gui.NBTEditGui;
 import cx.rain.mc.nbtedit.nbt.NBTTree;
diff --git a/common/src/main/java/cx/rain/mc/nbtedit/nbt/NBTTree.java b/common/src/main/java/cx/rain/mc/nbtedit/nbt/NBTTree.java
index fefa740..0d5ffad 100644
--- a/common/src/main/java/cx/rain/mc/nbtedit/nbt/NBTTree.java
+++ b/common/src/main/java/cx/rain/mc/nbtedit/nbt/NBTTree.java
@@ -174,7 +174,7 @@ public void setShowChildren(boolean value) {
 
         public static final String TAG_NAME = "name";
         public static final String TAG_TYPE = "type";
-        public static final String TAG_LIST_TYPE = "type";
+        public static final String TAG_LIST_TYPE = "elementType";
         public static final String TAG_VALUE = "value";
 
         public static Node<Tag> fromString(String data) {
diff --git a/gradle.properties b/gradle.properties
index 2f976c4..8462b2d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,6 +3,7 @@
 org.gradle.jvmargs=-Xmx3G
 org.gradle.daemon=false
 
+fabric.loom.multiProjectOptimisation=true
 enabled_platforms=fabric,forge
 
 archives_base_name=nbtedit