error

Ignoring exception in on_message
Traceback (most recent call last):
  File "c:\Users\MrShandy\Documents\GitHub\simple-voice\bot.py", line 20, in get_prefix
    cur.execute(f"SELECT prefix FROM simple_voice.server_{message.guild.id};")
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\pymysql\cursors.py", line 148, in execute
    result = self._query(query)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\pymysql\cursors.py", line 310, in _query
    conn.query(q)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\pymysql\connections.py", line 547, in query
    self._execute_command(COMMAND.COM_QUERY, sql)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\pymysql\connections.py", line 793, in _execute_command
    raise err.InterfaceError(0, "")
pymysql.err.InterfaceError: (0, '')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 343, in _run_event
    await coro(*args, **kwargs)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 942, in on_message
    await self.process_commands(message)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 938, in process_commands
    ctx = await self.get_context(message)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 852, in get_context
    prefix = await self.get_prefix(message)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 797, in get_prefix
    ret = await discord.utils.maybe_coroutine(prefix, self, message)
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\utils.py", line 329, in maybe_coroutine
    value = f(*args, **kwargs)
  File "c:\Users\MrShandy\Documents\GitHub\simple-voice\bot.py", line 22, in get_prefix
    return row
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\pymysql\connections.py", line 360, in __exit__
    self.close()
  File "C:\Users\MrShandy\AppData\Local\Programs\Python\Python39\lib\site-packages\pymysql\connections.py", line 404, in close
    raise err.Error("Already closed")
pymysql.err.Error: Already closed