I have an I-140 approval letter from the INS by a past employer. My present employer has started my GC process with a Prority date of june 2003. The earlier I-140 Approval notice has a Priority date of June 2001. I did not inform the USCIS of the earlier priority date when I filed my 485 application and the date they regard as the priority date is june 2003. What should I do to change the priority date on the 485 so that they use the june 2001 date as the real priority date?