There should be no need to clear any keys, just set to standard and you're good to go. If you ever need to boot into another OS like Linux (which includes boot USBs for some recovery software) then you might need to set it back to custom so that you can do that. Otherwise, just leave it set to standard boot 🙂
Z690 Hero, BIOS 2305, ME Firmware 126.96.36.1994, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 22H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.
"If you're lazy like me and do nothing else in life, be nice to yourself and back up your data today" 🙂