When my bot try to resend a group of photos, it splits it into separate messages. If it is a group of photos (in Telegram), I need to resend it wholly, as a group within one message. How to fix it?

from telethon import TelegramClient, events
import asyncio

Id_bot = 
Id_Group2 = 
Id_Group3 = 
Id_Group4 = 
Id_Group5 = 
api_id = ''
api_hash = ''

client = TelegramClient('none', api_id, api_hash)

@client.on(events.NewMessage)
async def handler(event):
    chat = await event.get_chat()
    chat_id = event.chat_id
    print(chat_id)

    # Forward only if the message is not sent in Id_Group1 to avoid an infinite loop
    if chat_id not in [Id_Group2, Id_Group3, Id_Group4, Id_Group5]:
        if event.media:
            if isinstance(event.media, list):
                # Multiple media files in a single message
                media = []
                for file in event.media:
                    media.append(await client.upload_file(file))
                await client.send_file(Id_bot, media[0], caption=event.message.message, file=media[1:])
            else:
                # Single media file
                caption = event.message.message if event.message.message else None
                await client.send_file(Id_bot, event.media, caption=caption)
        elif event.message.message:
            await client.send_message(Id_bot, event.message.message)

client.start()
client.run_until_disconnected()