I also have this

I thought it may have been due to the itins I had to put on hold while going through the .bomb nightmare of actually booking online....ah dont get me started! In the process, I called the MCC and they held the itin for me (at $236 price increase) . Of course these itins did expire as they were not ticketed in the timeframe, so I thought the message was to do with those

Who knows, but all my actual ticketed itins are there ^