diff --git a/ColorlessWorld-2024-4-2/Assets/Plugins/Microsoft.CSharp.dll.meta b/ColorlessWorld-2024-4-2/Assets/Plugins/Microsoft.CSharp.dll.meta
new file mode 100644
index 00000000..17bba4e5
--- /dev/null
+++ b/ColorlessWorld-2024-4-2/Assets/Plugins/Microsoft.CSharp.dll.meta
@@ -0,0 +1,27 @@
+fileFormatVersion: 2
+guid: a94cf6fef2879da4c91e5ef768aadf4e
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 0
+  isExplicitlyReferenced: 0
+  validateReferences: 1
+  platformData:
+  - first:
+      Any: 
+    second:
+      enabled: 1
+      settings: {}
+  - first:
+      Editor: Editor
+    second:
+      enabled: 0
+      settings:
+        DefaultValueInitialized: true
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/ColorlessWorld-2024-4-2/Assets/Scripts/Weapon/WeaponNode.cs b/ColorlessWorld-2024-4-2/Assets/Scripts/Weapon/WeaponNode.cs
index 4d5eec31..2a578516 100644
--- a/ColorlessWorld-2024-4-2/Assets/Scripts/Weapon/WeaponNode.cs
+++ b/ColorlessWorld-2024-4-2/Assets/Scripts/Weapon/WeaponNode.cs
@@ -423,29 +423,69 @@ public class WeaponNode : MonoBehaviour,IDragHandler, IBeginDragHandler, IEndDra
                     break;
                 case Name.WeaponNodeCondition.positionUnused:
                     Transform weaponSlotA = WeaponManager.Instance.playerWeaponNodeList.GetChild(int.Parse(conditionValue));
-                    Transform weaponANode = weaponSlotA.GetChild(0);
-                    WeaponNode nodeA = weaponANode.transform.GetComponent<WeaponNode>();
-                    if (position == int.Parse(conditionValue))
+                    if (weaponSlotA == null)
                     {
-
+                        check = false;
+                        break;
                     }
-                    else if (!nodeA.ConditionCheck(int.Parse(conditionValue)))
+                    if (weaponSlotA.childCount>0)
                     {
-                        check = true;
+                        Transform weaponANode = weaponSlotA.GetChild(0);
+                        WeaponNode nodeA = weaponANode.transform.GetComponent<WeaponNode>();
+                        if (weaponANode == null || nodeA == null)
+                        {
+                            check = false;
+                            break;
+                        }
+                        if (position == int.Parse(conditionValue) || nodeA.condition.Equals(Name.WeaponNodeCondition.position) || nodeA.condition.Equals(Name.WeaponNodeCondition.positionUnused))
+                        {
+                            check = false;
+                            break;
+                        }
+                        else if (!nodeA.ConditionCheck(int.Parse(conditionValue)))
+                        {
+                            check = true;
+                        }
+                    }
+                    else
+                    {
+                        check = false;
+                        break;
                     }
+                    
                     break;
                 case Name.WeaponNodeCondition.positionUsed:
                     Transform weaponSlotB = WeaponManager.Instance.playerWeaponNodeList.GetChild(int.Parse(conditionValue));
-                    Transform weaponBNode = weaponSlotB.GetChild(0);
-                    WeaponNode nodeB = weaponBNode.transform.GetComponent<WeaponNode>();
-                    if (position == int.Parse(conditionValue))
+                    if (weaponSlotB == null)
                     {
-
+                        check=false;
+                        break;
                     }
-                    else if (nodeB.ConditionCheck(int.Parse(conditionValue)))
+                    if (weaponSlotB.childCount > 0)
                     {
-                        check = true;
+                        Transform weaponBNode = weaponSlotB.GetChild(0);
+                        WeaponNode nodeB = weaponBNode.transform.GetComponent<WeaponNode>();
+                        if (weaponBNode == null || nodeB == null)
+                        {
+                            check = false;
+                            break;
+                        }
+                        if (position == int.Parse(conditionValue) || nodeB.condition.Equals(Name.WeaponNodeCondition.position) || nodeB.condition.Equals(Name.WeaponNodeCondition.positionUnused))
+                        {
+                            check = false;
+                            break;
+                        }
+                        else if (nodeB.ConditionCheck(int.Parse(conditionValue)))
+                        {
+                            check = true;
+                        }
                     }
+                    else
+                    {
+                        check = false;
+                        break;
+                    }
+                    
                     break;
                 case Name.WeaponNodeCondition.node:
                     check = checkConditionNode(nodesMark, nodesColor);