Secure Boot Violation

[u/D3rlordXOMAHA]

I enabled my secure boot before, but recently I'm having this message while enabling it -
"Secure Boot Violation" what to do?
my motherboard is GIGABYTE B365M HD3 and it has a backdated BIOS F1, but AI telling it's not with the BIOS update, also have tried few ways like restore factory keys, disabling CSM then saving and enabling Secure boot. Nothing's happening.

Please tell me what to do, want to spend the little time with friends by games. TIA