I've been living with that Err on my two D2H bodies since almost the day I've got each one of them. I got it fixed on another D2H during the Nikon "recall - free repair".
To me that Err is just a minor nuisance, which I almost don't notice. Cameras are still going strong with one of the bodies approaching 200K on the shutter now.
Once the shutter fails I'm going to replace it and keep it for another 8 years or so