SMBIOS model spoofing leads to stop sign at boot

Hi everyone, I was trying to spoof my 2011 MBP as a 2012 (because this machine was originally a 2012, but i had to put a 2011 board in it and wanted to make it look like original as much as possible) but after selecting moderate spoof and macbook 9,1 as model, when building OpenCore it leads the machine at a stop sign.

I saw spoofing being successfully for other people and I wonder what I'm doing wrong. I dont wanna change serial (even tho i have my original mid 2012 one printed on the bottom of the machine, and I am scared of messing up something.

Help appreciated!