Can't restore flash with bootmii

I wanted to restore my flash with BootMii. I installed it as IOS. I semi bricked my LU65.

I have preloader and can get to HBC and load BootMii. However when I try to restore flash, I get this error.
BootMii not found, too dangerous to continue! If your SD is corrupt or restore is interrupted, you will be unable to boot to fix it.

Why do I get this? Is it still possible to restore my flash?

Because you only have Bootmii/IOS. For safety reasons, it won't let you pass.

It IS possible, but inadvisable. You need a GC controller, and you need to go to restore NAND dump, then press A+B+X+Y all at the same time (which is tricky). But DONT DO IT. Its very risky. Please describe what you did, and what state your Wii is in so we can help you fix the brick.