Have you done this yet?
from The PT stud forum:
================================================== =======
Here is the latest PTS beta patch:
http://www.s217900936.onlinehome.us/patchpts10507c.exe
Fixes and enhancements in this patch:
-PokerStars added "USD" in the game level of each hand history which causes incorrect game level descriptions to be added to PTS
If you have any game levels that have "USD" in the description then you will need to merge these into the correct level or else you will start having problems. To do this use the menu and select Utilities > Database Maintenance and Options. Go to the Misc. tab and use the Change Game Level... button. After you convert a game level to the correct level you should delete the level if it is still listed on that tab.
Another option correct your data: use the Utilities > Database Maintenance and Options window to purge these sessions with the wrong game levels and then reimport your hand histories with this latest patch.