如何修复 RuntimeWarning: coroutine 'checking' was never waiting?

from aiogram import Bot, Dispatcher
from aiogram.fsm.storage.memory import MemoryStorage
import threading
import logging
import asyncio


import config as cf
from handler.start import start_router
from hand_callback.hand_callback import hand_router
from handler.admin import admin_router
from handler.state_handler import state_handler
from database import queue_silver


logging.basicConfig(level=logging.INFO)
bot = Bot(cf.API)
dp = Dispatcher(storage=MemoryStorage())


async def main():
    dp.include_routers(start_router, hand_router, admin_router, state_handler)
    thread = threading.Thread(target=queue_silver.checking)
    thread.start()
    await asyncio.sleep(6)
    await dp.start_polling(bot)

if __name__ == '__main__':
    print("Бот запущен")
    try:
        loop = asyncio.get_event_loop()
        loop.run_until_complete(main())
    except Exception as e:
        logging.error(f"An error occurred: {e}")

帮我修复错误

它给出的错误是：

C:\Users\user\AppData\Local\Programs\Python\Python38\lib\threading.py:870:
RuntimeWarning: coroutine 'checking' was never awaited 
self._target(*self._args, **self._kwargs)
RuntimeWarning: Enable tracemalloc to get the object allocation traceback