Delete inline message

import telebot

bot = telebot.TeleBot("ТВОЙ ТОКЕН")

m = telebot.types.Message
last_messages_data = {}


@bot.message_handler(['start'])
def start(msg: m):
    keyboard = telebot.types.InlineKeyboardMarkup()
    data = {"Товар 1": "t_1", "Товар 2": "t_2"}
    for text, key in data.items():
        keyboard.add(telebot.types.InlineKeyboardButton(text, callback_data=key))
    bot.send_message(msg.chat.id, "Твои товары:", reply_markup=keyboard)


@bot.callback_query_handler(func=lambda call: True)
def callback(call: telebot.types.CallbackQuery):
    global last_messages_data
    if call.data == "t_1":
        last = t_1(call.message)
        last_messages_data[call.from_user.id] = last
    if call.data == "t_2":
        last = t_2(call.message)
        last_messages_data[call.from_user.id] = last
    if call.data == "back":
        bot.delete_message(call.message.chat.id, last_messages_data[call.from_user.id])


def t_1(msg: m):
    keyboard = telebot.types.InlineKeyboardMarkup().add(
        telebot.types.InlineKeyboardButton("Назад", callback_data="back")
    )
    mess = bot.send_message(msg.chat.id, "Вот описание товара 1", reply_markup=keyboard)
    return mess.message_id


def t_2(msg: m):
    keyboard = telebot.types.InlineKeyboardMarkup().add(
        telebot.types.InlineKeyboardButton("Назад", callback_data="back")
    )
    mess = bot.send_message(msg.chat.id, "Вот описание товара 2", reply_markup=keyboard)
    return mess.message_id


bot.infinity_polling()