I am using API to batch insert products, problem it add products over and over again and also when I do batch inventory change it does not work

{
  "idempotency_key": "12c89fc4-6098-4e50-9718-7e0cf5033c49",
  "batches": [
    {
      "objects": [
        {
          "type": "ITEM",
          "id": "#bass-sport-headset-wireless-bluetooth-earphone-stereo-earpiece-earbuds-up-to-12hr-battery-life-green",
          "present_at_all_locations": true,
          "item_data": {
            "name": "Bass Sport Headset Wireless Bluetooth Earphone Stereo Earpiece Earbuds (Up To 12Hr Battery Life) - GREEN",
            "description": null,
            "category_id": "#ear-phone",
            "variations": [
              {
                "type": "ITEM_VARIATION",
                "id": "#bass-sport-headset-wireless-bluetooth-earphone-stereo-earpiece-earbuds-up-to-12hr-battery-life-green-variant",
                "present_at_all_locations": true,
                "item_variation_data": {
                  "item_id": "#bass-sport-headset-wireless-bluetooth-earphone-stereo-earpiece-earbuds-up-to-12hr-battery-life-green",
                  "name": "Regular",
                  "pricing_type": "FIXED_PRICING",
                  "price_money": {
                    "amount": 900,
                    "currency": "USD"
                  },
                  "sku": "PWR3-12HR-GRN"
                }
              }
            ]
          }
        },
        {
          "type": "CATEGORY",
          "id": "#ear-phone",
          "present_at_all_locations": true,
          "category_data": {
            "name": "Ear Phone"
          }
        }
      ]
    }
  ]
}

And inventory change

{
  "idempotency_key": "8fc6a5b0-9fe8-4b47-b46b-2ef95793abbe",
  "changes": [
    {
      "type": "PHYSICAL_COUNT",
      "physical_count": {
        "reference_id": "1536bfbf-efed-48bf-b17d-a197141b2a92",
        "catalog_object_id": "RVZJFGEZGOZ3TYMGLKLFHYCT",
        "state": "IN_STOCK",
        "location_id": "########",
        "quantity": "53",
        "employee_id": "########",
        "occurred_at": "2019-09-28T22:25:24.878Z"
      }
    }
  ],
  "ignore_unchanged_counts": false
}