Shaneed, your going to have fun fixing all of this if you go forward with your upgrade. Right now you have 2 choices as I see them.
1. Re-set the site to 6.1.4 with a back-up of the DB & the public_html/directory (or whereever you have your files). Then you can consider starting over again. Question though real quick, did you do the 6.1.5 upgrade before you did the 6.1.6 upgrade? They have to be done in order and no steps can be skipped in this.
2. If you did the upgrades in the correct order, you can fix this DB error yourself, but it will be time consuming for you.
Login to your cPanel and go to phpMyAdmin and select the DB for the 6.1.4 if you still have it somewhere or grab a back up of the DB and ask them to set it up a new DB and set it in there. Your host should do this for you no problem, not a huge deal.
Next, login and pull up in phpMy Admin your DB of the 6.1.6 system.
Now, in each you need to go to profiles & then click on Browse in the top menu, next take a look at the number of pages you have (right now your at 30 per page) and do the math, figure your total number of profiles. If it's 429 then you need to set it as follows at the bottom of the page:
And then click "Show" this will make all the profiles (however many there are show up)
Next, you want to scroll back to the bottom & click the "Check All" and then you want to click the "Pencil" icon next to With selected:
This is going to open all the Profiles up for you to edit them. Do this in the 6.1.4 DB & the 6.1.6 DB and set them side by side on your screen so you can look at 6.1.4 & fill in 6.1.6 as you go. Your after the first field on each one of the profiles. They will not necessarily go in numerical order if you have had some members delete their profiles and your looking to make everything match up, so this is how your going to do it. Wish I could just write an SQL query for you, but we don't know if it did it in the same exact numerical order on 6 as it was in 4.
When your finished and get to the bottom of the page (it will be a very very very long page) just click "Go" at the bottom and it will save it all for you and update the DB accordingly.
Good luck and I hope you have tons of good music, because this is going to take a little bit of time to fix.
***Note: Boonex may want to take a look at what did happen here, as this is NOT supposed to happen from a simple upgrade from 6.1.4 to 6.1.6 if you did it properly.