fix: warning for deletion failure

scripts/add_item.py

@@ -118,6 +118,8 @@ def delete_existing(item_id: str, media_type: str, log: str) -> None:
     ]
     if len(log_items) < (old_len - 1):
         raise Exception("More than one deletion made, discarding…")
+    elif len(log_items) == old_len:
+        raise Exception("No item deleted, skipping…")
 
     with open(f"./data/{media_type}/{log}.json", "w", encoding="utf-8") as log_file:
         json.dump(log_items, log_file, indent=4)