diff --git a/SchematicSystem_Core/src/de/steamwar/schematicsystem/SafeSchematicNode.java b/SchematicSystem_Core/src/de/steamwar/schematicsystem/SafeSchematicNode.java
index 9957695..5e15684 100644
--- a/SchematicSystem_Core/src/de/steamwar/schematicsystem/SafeSchematicNode.java
+++ b/SchematicSystem_Core/src/de/steamwar/schematicsystem/SafeSchematicNode.java
@@ -1,10 +1,10 @@
 package de.steamwar.schematicsystem;
 
-import de.steamwar.schematicsystem.commands.SchematicCommandUtils;
 import de.steamwar.sql.SchematicNode;
 import de.steamwar.sql.SteamwarUser;
+import lombok.AllArgsConstructor;
 import lombok.NonNull;
-import org.bukkit.Material;
+import org.bukkit.entity.Player;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -13,6 +13,9 @@ import java.util.List;
 public class SafeSchematicNode {
 
     public static Result setParent(@NonNull SteamwarUser user, @NonNull SchematicNode node, SchematicNode newParent) {
+        if(user.getId() != node.getId()) {
+            return Result.NOT_OWNER;
+        }
         if(newParent == null) {
             if(SchematicNode.getSchematicsAccessibleByUser(user.getId(), 0)
                     .stream().map(SchematicNode::getName).anyMatch(s -> s.equalsIgnoreCase(node.getName()))) {
@@ -36,6 +39,10 @@ public class SafeSchematicNode {
     }
 
     public static Result setName(@NonNull SteamwarUser user, @NonNull SchematicNode node, @NonNull String name) {
+        if(user.getId() != node.getId()) {
+            return Result.NOT_OWNER;
+        }
+
         if(invalidSchemName(name)) {
             return Result.INVALID_NAME;
         }
@@ -48,10 +55,6 @@ public class SafeSchematicNode {
         return Result.DONE;
     }
 
-    public static Result setItem(@NonNull SteamwarUser user, @NonNull SchematicNode node, @NonNull Material material) {
-
-    }
-
     private static final List<String> FORBIDDEN_NAMES = Collections.unmodifiableList(Arrays.asList("public"));
     public static boolean invalidSchemName(String name) {
         if (name.isEmpty()) {
@@ -74,11 +77,19 @@ public class SafeSchematicNode {
         return FORBIDDEN_NAMES.contains(name.toLowerCase());
     }
 
+    @AllArgsConstructor
     public enum Result {
-        DONE,
-        NOT_A_DIR,
-        ALREADY_IN_DIRECTORY,
-        INVALID_NAME;
+        DONE("No"),
+        NOT_A_DIR(SchematicSystem.PREFIX + "§cDie ausgewählte Schematic ist kein Ordner"),
+        ALREADY_IN_DIRECTORY(SchematicSystem.PREFIX + "§cDie Schematic gibt es bereits in diesem Ordner"),
+        INVALID_NAME(SchematicSystem.PREFIX + "§cDieser Name ist unzulässig"),
+        NOT_OWNER(SchematicSystem.PREFIX + "§cDu bist nicht der Besitzer dieser Schematic");
+
+        private String errorMessage;
+
+        public void sendError(Player player) {
+            player.sendMessage(errorMessage);
+        }
 
         public boolean isSuccessful() {
             return this == DONE;
diff --git a/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/GUI.java b/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/GUI.java
index ea47d1b..fbabed5 100644
--- a/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/GUI.java
+++ b/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/GUI.java
@@ -20,6 +20,7 @@
 package de.steamwar.schematicsystem.commands;
 
 import de.steamwar.inventory.*;
+import de.steamwar.schematicsystem.SafeSchematicNode;
 import de.steamwar.schematicsystem.SchematicSystem;
 import de.steamwar.sql.*;
 import org.bukkit.Material;
@@ -102,8 +103,12 @@ public class GUI {
             inv.setItem(5, skull);
             inv.setItem(6, Material.ARROW, "§eVerschieben", clickType -> {
                 SchematicSelector selector = new SchematicSelector(player, SchematicSelector.selectDirectory(), npar -> {
-                    node.setParent(npar==null?null:npar.getId());
-                    info(player, SchematicNode.getSchematicNode(node.getId()));
+                    SafeSchematicNode.Result result = SafeSchematicNode.setParent(user, node, npar);
+                    if(result.isSuccessful()) {
+                        info(player, SchematicNode.getSchematicNode(node.getId()));
+                    } else {
+                        result.sendError(player);
+                    }
                 });
                 selector.open();
             });
@@ -112,10 +117,12 @@ public class GUI {
                 SWAnvilInv anvilInv = new SWAnvilInv(player, node.getName() + " umbenennen", node.getName());
                 anvilInv.setItem(finalMat);
                 anvilInv.setCallback(s -> {
-                    if (!invalidSchemName(player, new String[]{s})) {
-                        node.setName(s);
+                    SafeSchematicNode.Result result = SafeSchematicNode.setName(user, node, s);
+                    if(result.isSuccessful()) {
+                        info(player, node);
+                    } else {
+                        result.sendError(player);
                     }
-                    info(player, node);
                 });
                 anvilInv.open();
             });