How to get Older priority date

Ramana77

Registered Users (C)
I have I-485 pending with Jan-06 as priority date using PERM. Recently my old labor from BPC got approved from the same company. The priority date is JUN-03. Is it possible to get my older priority date? If yes, do I need to file for petition or will USCIS know about it?
 
Thanks a lot for the reply. But My I-140 is already approved based on PERM labor. Can a company file multiple I-140s? The job description in both cases is same.
Thanks in advance.
 
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