It took them a long time to get around to admitting it.
The field is unstable and this is why magnetic north cannot settle down. It is aiming for a new stability that will place it opposite to where it is now and when this happens, life will get real interesting down here. Interesting indeed. Like the Chinese curse. I suspect we will all live to see wonders in the skies beyond our wildest imaginings.
In addition to about a thousand other reasons, this is why you need a vault. To survive those wonders intact.
If you read the article, you will see it contradicts its own conclusions. That is what passes for science in the modern world.