No idea, but years ago when I was building my AR I bought just the stripped lower and registered it. Registration says “caliber multi” or something like that. So I guess if the firearm is registered as a specific caliber maybe you could be open to prosecution. Like registering a g22 for ccw, then converting it to .50. If you got caught with that I don’t doubt they would do all they can to prosecute you.
Unless you change the firearm to use a caliber that's banned, there's nothing to prosecute AFAIK.
HPD makes mistakes in the registration information all the time. i have a registration form that says my Mosin-Nagant 91/30 is a semi-auto rifle. it's not a stretch to blame it on an administrative error.
As far as your g22 example, it's not the same thing. If the firearm is registered as a frame or receiver only and then completed, there was no "conversion." The G22, on the other hand, was registered as one caliber and then converted to another. However, since the serial number remains the same, that, to me, makes it still the same firearm that was registered on the CCW application.
Unless there's a part of the CCW statute that forbids modification of a CCW pistol's size, barrel length, caliber, etc., it's still a pistol or revolver with the same serial number which matches the CCW license paperwork.
That's not a legal opinion. It's my own opinion based on the process and law as I read it.