In addition to the games previously listed without HPU data, I have also found that there are 6 cases of the same umpire being listed as the HPU for 2 different games on the same day which need correction. Note that I have not checked to see if all HPU data is correct (I am working on a way to confirm this). These ones are just very obvious due to the fact that to my knowledge it would be very unlikely for this to happen except in very extreme circumstances (such as 3 umpires have a positive COVID-19 test on the morning of a doubleheader leaving just one MLB umpire from the crew and they recruit local college umpires to cover the bases for both games of the doubleheader).
Here are the 6 games with the incorrect and the correct data listed.
CORRECT
date=20210401
Astros @ Athletics
HPU=Brian Gorman
INCORRECT
date=20210401
White Sox @ Angels
current HPU=Brian Gorman
correct HPU=Larry Vanover
CORRECT
date=20210417
Blue Jays @ Royals GAME 1
HPU=Chris Guccione
date=20210417
Blue Jays @ Royals GAME 2
current HPU=Chris Guccione
correct HPU=Alan Porter
CORRECT
date=20210425
Diamondbacks @ Braves GAME 2
HPU=Jeremy Riggs
INCORRECT
date=20210425
Diamondbacks @ Braves GAME 1
Current HPU=Jeremy Riggs
Correct HPU=Jansen Visconti
date= 20210429
Tigers @ White Sox GAME 2
HPU=Chris Conroy
date= 20210429
Tigers @ White Sox GAME 1
current HPU=Chris Conroy
correct HPU = Trip Gibson
CORRECT
date=20210505
Mets @ Cardinals GAME 2
HPU=James Hoye
INCORRECT
date=20210505
Mets @ Cardinals GAME 1
current HPU=James Hoye
correct HPU=Brennan Miller
Mets @ Braves
HPU=Sam Holbrook
Red Sox @ Blue Jays
Current HPU=Sam Holbrook
Correct HPU=Alfonso Marquez