I filed an I-485 a few years ago and it is still pending. Since that I-485 had a little technical glitch (when I filed it, I left the original employer), I re-started another RIR process after I changed employer as a hedge. Now it is about the time that this new process will enter filing I-140 and I-485 again. I was wondering whether it has any negative impact if I file two LC-based I-485s with the USCIS. Or is it safe to have the original I-485 linked to the new I-140 after its approval. Thanks for any help from friends.