[Python] Asynchronously uploading a file to an HFS server without saving it to the device

I'm trying to upload a file to the HFS server without saving it to the device. It works synchronously, with saving json to the device, but there are problems with asynchronous sending. I get the following error Duplicate Content-Length:\n\n bytearray(b'Content-Length: 623

async def upload_data_HFS(import_url, username, password, data):
"""Отправка JSON-данных в виде файла на HFS-сервер"""

timestamp = datetime.now().strftime("%d-%m-%Y-%H-%M")
file_name = f"{timestamp}-visit.json"

json_data = json.dumps(data, indent=4, ensure_ascii=False)

try:
async with aiohttp.ClientSession() as session:
form_data = aiohttp.FormData()
form_data.add_field(
"file",
io.StringIO(json_data),
filename=file_name,
content_type="application/json"
)

async with session.post(import_url, data=form_data, auth=BasicAuth(username, password)) as response:
response_text = await response.text()
status = response.status

if status == 200:
return {"status": status, "message": "Upload successful"}
else:
logging.error(f"Ошибка {status}: {response_text}")
return {"status": status, "error": response_text}

except Exception as e:
logging.error(f"Ошибка при загрузке файла: {e}")
return {"status": "Error", "error": str(e)}


I tried saving the file to the device and then uploading it to the server, and it worked, but synchronously sending the file and downloading it to the device slows down the execution of the rest of the code

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