Just means its had a Cherished transfer, nothing to worry about,,, every one of mine, and my family's cars would have the same marker come up on a HPI check...
Always check that the Chassis/VIN plate/Engine Number all tie up with whats written in the Log book, and the Reg No on the Tax disc, matches the plate thats on the car
Old MOT certs should show the previous cherished number, for how long it was assigned to the car
Thom