Does it say a data field is missing or incorrect? If so then yes, that is the problem.
You can DL any apps you had previously purchased though as long as they don't require webOS 1.4.x or later in the app cat. (you can't even see those) ie. Angry Birds is one.
If you have another Pre 2 that isn't sprintified you can recover your profile on that phone, purchase what you want then put it (your profile) back on your Sprint Pre 2 and can then re-DL the apps fine.
Clicking the Thanks button is a great way to say... well THANKS Phone Apps: Church Search, Tap for HELP TouchPad Apps: Tap for HELP! HD, webOS Meetups