IndexError: list index out of range В AioGram

@dp.message(Command("update"))
async def cmd_start(message: types.Message):
    await message.reply("Минутку")
    i1 = 0
    i2 = 1
    i3 = 2
    print(userdata[i1])
    print(userdata[i2])
    print('Участок: ',userdata[i3])

    print(userdata)

    while True:
        i1 += 3
        i2 += 3
        i3 += 3
        #print(i1, i2, i3)
        data1 = userdata[i1]
        data2 = userdata[i2]
        data3 = 'УЧ: ',userdata[i3]

        await bot.promote_chat_member(chat_id="-1002247230310", user_id=data2 is_anonymous: False, can_manage_chat: False, can_delete_messages: False, can_manage_video_chats: False, can_restrict_members: False, can_promote_members: False, can_change_info: False, can_invite_users: False, can_post_stories: False, can_edit_stories: False, can_delete_stories: False, can_post_messages: True)
        await bot.set_chat_administrator_custom_title(chat_id='-1002247230310', 
                                                user_id=data2, 
                                                custom_title=data3)

Userdata Это Список по типу ['TNC', 5746164626, '???']