STM32N6570-DK Restoring Default Firmware Before Custom Code Upload

[SITARAM]

Hello ,

I recently purchased the STM32N6570-DK Discovery Kit. When I first powered it on, it showed a default video demo on the LCD along with live imaging, which I assume is the factory firmware.

Now, I would like to try some basic operations like UART communication and toggling an LED, so I created a new project for that.

Before flashing my custom code, I used STM32CubeProgrammer to read and save the default firmware as a .hex file from the board.

Before running my custom application, I wanted to restore the default original  demo by reloading the saved .hex  file. However, when I tried to program the board with this .hex file using STM32CubeProgrammer, it failed to load and showed an error (attached in the image).

So here are my questions:

1. Is it possible to directly reload the saved .hex  file to get back the default factory demo?

2. Or do I need to generate a Project_trust .bin file with a proper secure header and flash that instead?

3. What is the correct method to restore the factory configuration and demo on this board?

Thank you in advance.