Why can't the bot find a chat to send?

Question

Python

@dp.message_handler(commands=['sendall'])
async def sendall(message: types.Message):
  if message.chat.type == 'private':
      text = message.text[9:]
      users = db.get_users()
      for row in users:
        try:
          await bot.send_message(row[0], text )
          if int(row[1]) !=1:
            db.set_active(row[0], 1) 	
        except Exception as e:
   	        print(e)
        	db.set_active(row[0], 0)

      await bot.send_message(message.from_user.id,"Успешная рассылка")

Error:
Chat not found
Chat not found

I don't understand why such an error, messages were sent to the bot earlier.