How I found the RFQ NUMBER RFQ,1 (WHICH HAS THE AMMENDMEND CREATED ) VIA BACKHAND ??

Hello Gurus,

I am struggling to find out the following possible situation as;

Note : The Purpose of all these excersice is to update the Need By Date by back hand I-e custome package in the form of concurrent.

Scenario :

I have created the RFQ from Requisition and publish the RFQ also its given me RFQ number say 4063.

I am able retrieve all the record of this Published RFQ via  following details

PON_AUCTION_HEADERS_ALL

PON_AUCTION_ITEM_PRICES_ALL

Now I am amend the RFQ and change certain information like close date Need by Data and on saving system gives me 4603,1 as number of RFQ. But I am unable to retrieve this data via back hand I mean which table and what are possible link ???