A Guy's answer is much more consistent with my experience.
If they swapped a part, the new number would be on the part.
Since they just swapped software, the old part sticker is now invalid, thus the new sticker only.
Take a good picture, laminate it and the sticker (both, separately) with good tape, and put the pic in the glove box/book.
Underhood Sharpie ink does not last well, and someone will want to know later.
Here is the Technical Service Bulletin (TSB) for the software upgrade:
Dodge TSB 18-010-13
Make: Dodge Number: 18-010-13 Date: 3/6/2013 Title: Flash: Mil Illumination P0340- Camshaft Position Sensor Circuit - Bank 1 Sensor 1 Models:
2011-2012 Challenger R/T
2011-2012 Challenger R/T Classic
2011-2012 Challenger R/T Plus
2011 Challenger Rallye
2011 Challenger SE
2011-2012 Challenger SRT-8
2012 Challenger SXT
2012 Challenger SXT Plus
Summary: Flash: mil illumination p0340- camshaft position sensor circuit - bank 1 sensor 1 this bulletin involves selectively erasing and reprogramming the powertrain control module (pcm) with new software. A small number of customers may experience a malfunction indicator lamp (mil) illumination. Upon further investigation the technician may find that the following diagnostic trouble code (dtc) has been set: p0340 - camshaft position sensor circuit - bank 1 sensor 1