Why, in 2014, was the Porsche 917K pulled from the Gooding auction?

I am trying to remember famous incidents where a highly touted car was pulled from auction. One that comes to mind was the 917 pulled from Gooding's Pebble Beach action in 2014, a1969 Porsche 917K, chassis 917-024. Gooding wouldn't say why it was pulled but are there any articles in print saying why? And wasn't there a fake Aston Martin coupe, designed to look like a Zagato 212, 214 or 215? I don't know if that was pulled from an auction but Pebble beach rescinded their award when it was found the real car has been buried with the man killed in it. Thanks for any good examples

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EX-SIFFERT GULF 917K FROM “LE MANS” PULLED FROM GOODING’S PEBBLE BEACH AUCTION

7/30/20144:12 ESTFILED TO: FOR SALEBY: PEPPER GIRL4 COMMENTS

A little over a month ago, Gooding & Co. announced the addition of a 1969 Porsche 917K, chassis 917-024, to its Pebble Beach Auctions to be held this coming August. The automotive and mainstream press (ourselves included) eagerly jumped on the story and rumors of a potential new record price for this "iconic" Porsche 917 quickly grew. It was definitely THE auction to watch this summer. However, a little less than two weeks before the auction, FLATSIXES.com has learned that 917-024 will no longer be on offer during the Gooding & Co. auction. When we reached out to Gooding for more details we were simply told that,

The car has been withdrawn from the sale. Gooding & Company does not comment on property withdrawn from our auctions.

We don't have more details and it doesn't look like any are forthcoming. We simply want to make sure that those planning on watching this particular Porsche cross the block know that it will no longer be there.