I’m working on telegram bot, using telethon and aiogram. Code below is one of the methods of the Bot class. When it’s used twice, variables acc_phone_number, verification_code and client get new values, but the problem is that in get_acc_phone_number they have same values, as they had after the first usage of AddAccountForWork method.

async def AddAccountForWork(self, callback: types.CallbackQuery):   
            
        @self.disp.message(F.text)
        async def get_acc_phone_number(message: types.Message):

            nonlocal acc_phone_number, verification_code, client, callback
            print(acc_phone_number, verification_code, client, 'nn')
            acc_phone_number = message.text
            if self.db_manager.AccountForWorkExists(acc_phone_number):
                await message.delete()
                await callback.message.edit_text(messages.account_exists, reply_markup=keyboards.get_back_to_menu_keyboard())
            else:
                try: 
                    await client.send_code_request(acc_phone_number)
                    time.sleep(0.3)
                    await message.delete()
                    await callback.message.edit_text(messages.ask_for_verification_code.format(verification_code), reply_markup=keyboards.get_enter_verification_code_keyboard())
                except PhoneNumberInvalidError:
                    await message.delete()
                    await callback.message.edit_text(messages.wrong_phone)


        @self.disp.callback_query(F.data.startswith('code_number'))
        async def get_verification_code(callback: types.CallbackQuery):

            nonlocal acc_phone_number, verification_code, client
            symbol_num = 0
            for symbol in verification_code:
                if symbol == '_': 
                    new_verification_code = list(verification_code)
                    new_verification_code[symbol_num] = callback.data[-1]
                    verification_code = ''
                    for i in new_verification_code: verification_code += i
                    break
                symbol_num += 1
            await callback.message.edit_text(messages.ask_for_verification_code.format(verification_code), reply_markup=keyboards.get_enter_verification_code_keyboard())
            time.sleep(0.3)
            if verification_code[-1] != '_': 
                try:
                    await client.sign_in(acc_phone_number, verification_code)
                    string_session = StringSession.save(client.session)
                    user_name = callback.from_user.username
                    self.db_manager.AddAccountForWork(user_name, string_session, acc_phone_number)
                    await client.log_out()
                    await client.disconnect()
                    client = None
                    await callback.message.edit_text(messages.finish_adding_account, reply_markup=keyboards.get_back_to_menu_keyboard())
                except PhoneCodeInvalidError:
                    verification_code = '_____'
                    await callback.message.edit_text(messages.invalid_code.format(verification_code), reply_markup=keyboards.get_enter_verification_code_keyboard())


        acc_phone_number, verification_code = '', '_____'
        tg_api_id, tg_api_hash = os.getenv('TGAPIID'), os.getenv('TGAPIHASH')
        client = TelegramClient('session', tg_api_id, tg_api_hash, system_version='4.16.30-vxCUSTOM')
        await client.connect()
        await callback.message.edit_text(messages.ask_for_phone)
        print(acc_phone_number, verification_code, client, 'nn')

Can you please explain why?