At a guess, the "working to move it" sentence probably implies that they are trying to get those agreements retrospectively, or re-writing any code that was contributed where they can't. As I understand it, the majority of code was written by themselves, so it shouldn't be too much of a task. Openstreetmap similarly moved licenses recently, they gained agreements where they could and dumped or re-mapped data where they couldn't.

If they aren't planning to do this, then I don't know what the "working to move it" means as it would simply be a 5 minute job to changing the license text.