Using the previous priority date after restart of GC process

[Vishwesh]

I have a query related to my GC process. 

My GC was filed by my employer in EB3 category. I-140 was approved eventually and I got June 2008 as my priority date. Since then was waiting for priority date to be current so that I-485 could be filed. For some reasons I had to quit my job and return to India in July 2016. But I plan on going back again to the same job. My company says that they would need to start the GC process all over again i.e. File for labor and then I-140.

My question is - Can my previously approved I-140 be reinstated within this new process and can continue with that same priority date as its the same employer that I will be rejoining.

Thanks.