Supermicro X11DDW8-NT Downgrading bios help

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

Hey guys.
I have X11DDW8-NT with bios 4.2 and IPMI 1.74.14 + retail Xeon Platinum 8153 SR3BA.

I need to downgrade to 2.0 Bios, which I have already but when I am trying to do this - I get an error: “current BIOS does not support software controllable motherboard manufacturing mode”

Found that the solution will be to move jumpers JPME1/JPME2 to pins 2 and 3,
then find “afuefi.SMC” inside the downloaded BIOS .zip file, and rename it to “afuefi.efi”.
After this open the UEFI again and run “afuefi.efi /p /b /n /k /r /me” command.
But this just gives me an error: “Problem to allocating BIOS buffer” or “Problem opening file for reading”

PXL_20241204_003709483
PXL_20241204_0037094831920×1446 192 KB

Please, guide me where to dig further.

2

Damn.

The command to update the bios we supposed to be : “afuefi.efi X11DDW8.307 /p /n /k /r /me” where X11DDW8.307 is the bios file name which you installing

But it gives another error:
c2 - error: Region is write-protected

PXL_20241204_012443075.MP
PXL_20241204_012443075.MP1920×1446 173 KB

But bios shows now that it is 2.0b! f yea!