It was revealed in our interview with Ryder Windham at the 26:50 mark:
The three choice highlight quotes:
"I should stress that the story bible I first read, LEGO's own story bible... it was a constant work in progress, it seemed like every several weeks I would get these updates that they were adding things, modifying it, expanding it..."
"...So, I started getting confused again, like... I got the impression that LEGO was... sometimes, they were maintaining their secrecy for 'security', keeping the information close, but, in some cases, I think they were finding new opportunities where they thought 'oh, this would be interesting!' as part of a backstory. I didn't always quite understand how everything meshed, and from the correspondence we had... I'm not always sure that they knew how it meshed either. They just thought 'Oh, this has a good opportunity for a toy,' and I was like 'Yeah, but I'm the one who has to write about it!' It's one thing to put a few sentences on a toy package or on the website, something to describe a character, but I'm not Mr. Know-it-All, I'm not a mind reader! I'm just trying to figure out how to make this thing, all these story aspects sound... real, I guess, and somewhat logical."
"For working on the story, yeah, I can't remember all the details, but it's just to understand... it was a work in progress. The story bible... I was getting new information while I was working on the books, so sometimes it was an effort to try to tie up loose ends that I didn't even know existed until I was almost done with the book."
It's been years since we conducted it, but I'd imagine there was a lot more specifics gleamed from that interview than just that segment, so it may benefit a re-listen. I've forgotten what exactly was discussed in specific detail.