I bought a used C6220 II system board 0083N0 which has BIOS 3.2.11 from 2014. I would like to update that, but all current BIOS for C6220/C8220 series are 2.x. I haven't been able to figure out what that old 3.2.11 is and if it is safe to update to current 2.9 or similar?