My radio was given a NEW ID#

Does anyone know why my Sirius car radio was given a new ID#? Went to the store, worked fine. Went home 1 hour later...no radio. Got the ID# on the radio and called Sirius and they told me it was different from the ID# on my account, which was begun over two years ago. They changed the radio ID# on my account...all was OK after they refreshed the data.
Question is, the dealer didn't change my radio ID#, so how could this happen???
Any ideas???

Thanks

Russian hackers, maybe? Car dealers can't change the ID number. On most SiriusXM radios, the number is displayed on Channel 0. It is also shown on your online account -- if you have an online account:

https://care.siriusxm.com/login_view.action

Is the new ID number completely different from the original number or does it differ by just a single digit? Most likely, someone at SiriusXM inadvertently altered the number in the database.