The odds of the PEP application causing a problem with your EP is virtually nil. If it were so, then then would not have been giving P1 EP holders letters inviting them to apply for PEPs. Go ahead and apply for it. Who knows, you might get lucky.
SOME PEOPLE TRY TO TURN BACK THEIR ODOMETERS. NOT ME. I WANT PEOPLE TO KNOW WHY I LOOK THIS WAY. I'VE TRAVELED A LONG WAY, AND SOME OF THE ROADS WEREN'T PAVED. ~ Will Rogers