diff --git a/src/app/project/game-model/GameModel.ts b/src/app/project/game-model/GameModel.ts
index a96ad25..a7d5c6c 100644
--- a/src/app/project/game-model/GameModel.ts
+++ b/src/app/project/game-model/GameModel.ts
@@ -29,7 +29,7 @@ export class GameModel {
     this.gameModelName = gameModelName;
 
     this.addAbstractItemgroup("Clothing", undefined);
-    this.addAbstractItemgroup("Inventory", undefined);
+    this.addConcreteItemgroup("Inventory", undefined);
     this.addConcreteItemgroup("Oberteil", GameModel.findItemgroupByName("Clothing", this.itemgroups)! as AbstractItemGroup);
     this.addConcreteItemgroup("Hose", GameModel.findItemgroupByName("Clothing", this.itemgroups)! as AbstractItemGroup);
 
@@ -50,7 +50,7 @@ export class GameModel {
     }
   }
 
-  addConcreteItemgroup(groupName: string, parentgroup: AbstractItemGroup) {
+  addConcreteItemgroup(groupName: string, parentgroup: AbstractItemGroup | undefined) {
     //Ensure that Itemgroup does not exist
     if(parentgroup == undefined) {
       if(GameModel.findItemgroupByName(groupName, this.itemgroups) == undefined) {
diff --git a/src/app/project/game-model/inventory/AbstractItemGroup.ts b/src/app/project/game-model/inventory/AbstractItemGroup.ts
index 5141f5a..5702524 100644
--- a/src/app/project/game-model/inventory/AbstractItemGroup.ts
+++ b/src/app/project/game-model/inventory/AbstractItemGroup.ts
@@ -11,6 +11,7 @@ export class AbstractItemGroup extends ItemGroup {
   }
 
   protected addCharacteristicValue(characteristic: ItemGroupCharacteristic): void {
+    console.log("Abstract Characteristic Value: Do nothing (" , characteristic.characteristicName , ")")
       //Do Nothing
   }
 
diff --git a/src/app/project/game-model/inventory/Item.ts b/src/app/project/game-model/inventory/Item.ts
index bbe2140..cc2a8ac 100644
--- a/src/app/project/game-model/inventory/Item.ts
+++ b/src/app/project/game-model/inventory/Item.ts
@@ -30,6 +30,7 @@ export class Item extends ModelComponent {
   addInheritedGroup(itemgroup: ItemGroup) {
     if(this.findItemgroupByName(itemgroup.componentName) == undefined) {
       this.manuallyInheritedGroups.push(itemgroup);
+      itemgroup.manuallyInheritedItems.push(this);
       this.initializeItemCharacteristicsOfItemgroup(itemgroup);
     }
   }
@@ -40,6 +41,7 @@ export class Item extends ModelComponent {
   }
 
   addCharacteristic(characteristic: ItemGroupCharacteristic) {
+    console.log("Add Characteristic: " , characteristic)
     const characteristicValue = new ItemgroupCharacteristicValue(characteristic, 0);
     if(!this.isValueInitialized(characteristic)) {
       this.itemCharacteristicValues.push(characteristicValue);
diff --git a/src/app/project/game-model/inventory/ItemGroup.ts b/src/app/project/game-model/inventory/ItemGroup.ts
index 3096e7b..e4dd726 100644
--- a/src/app/project/game-model/inventory/ItemGroup.ts
+++ b/src/app/project/game-model/inventory/ItemGroup.ts
@@ -12,6 +12,7 @@ export abstract class ItemGroup extends ModelComponent {
   addItemgroupCharacteristic(itemgroupCharacteristic: ItemGroupCharacteristic) {
     this.itemGroupCharacteristics.push(itemgroupCharacteristic);
     this.addCharacteristicValueForManuallyItems(itemgroupCharacteristic);
+    console.log("[Itemgroup] Add ItemgroupCharacteristic ", itemgroupCharacteristic);
     this.addCharacteristicValue(itemgroupCharacteristic);
   }