Why Sky3DS gets 002-0123 even with a private header.

I don't know how many people this applies to, because I've read many times that people just dump one game and it works across all of theirs just fine, sadly, this isn't the case for me and I've seen about 3 people make a thread asking why they're getting this error, and they've gotten no answers basically.

So turns out, if I'm correct, it's because of the manufacturer.

All of my ROMs aside from Smash, didn't work online with my header information from my own dump of Animal Crossing....

Why Sky3DS gets 002-0123 even with a private header.