Here is my screenshot for step 78

Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, uninstall Max's Pitch Package, etc. That can make it worse. There's a 95% chance the same snag/fix is listed & answered in the Help FAQ. But if you can't find it there, post your problem here.
Make sure you post in the right category below & be sure to include a screencap showing the issue!
Ok, well it looks like you repeated the import of the data a couple of times and wound up with lots of extra Pitch records.
You can delete all the ones above P-009 if you want to and then continue on.
Or if you want to start over, you can get a brand new account and start at Step 5 of Lab 1b. And if you email me at tim.hill@themaxlabsproject.com I can give you a promo code so you don't have to pay again.