fix: don't throw an error if questKey already exists

src/services/inventoryService.ts

@@ -333,7 +333,7 @@ export const addItem = async (
             const key = addQuestKey(inventory, { ItemType: typeName });
             if (key) {
                 return { InventoryChanges: { QuestKeys: [key] } };
-            }
+            } else return { InventoryChanges: {} };
         } else {
             const key = { ItemType: typeName, ItemCount: quantity };
 

src/services/questService.ts

@@ -77,7 +77,7 @@ export const updateQuestStage = (
 
 export const addQuestKey = (inventory: TInventoryDatabaseDocument, questKey: IQuestKeyDatabase) => {
     if (inventory.QuestKeys.some(q => q.ItemType === questKey.ItemType)) {
-        logger.error(`quest key ${questKey.ItemType} already exists`);
+        logger.warn(`Quest key ${questKey.ItemType} already exists. It will not be added`);
         return;
     }
     const index = inventory.QuestKeys.push(questKey);