Can't Revert to Original Elegoo Firmware – MCU Error

[Quazo1337]

Hello, I have a problem. I wanted to go back to the original firmware from Elegoo, but I can't. I'm following the guide, but nothing changes. I have OpenNeptune installed on an additional eMMC, and I’d like to return to the previous Elegoo version. However, when I switch to it, I get an MCU error. I'm using this guide: https://github.com/OpenNeptune3D/OpenNept4une/tree/main/mcu-firmware