What version are you running?
FWIW, I noticed a whole lot of profiler conflicts after upgrading from 6.7.9 to 6.8.6. Random things like PCs, iPhones, Macs throwing conflicts, and lots of network devices previously found through ARP reads coming up with conflicts as Linksys Routers.
I would suggest opening a ticket with TAC.
It may be possible to download the fingerprint dictionary YAML file, remove the HP printer fingerprint, and manually upload it. I don't know if fingerprint dictionary uploads are additive or if they overwrite the existing dictionary. Also, it's just as likely that by removing a fingerprint, the devices would get classified with a conflict as the next-best fingerprint match.