Upgrade 6.x to 8.00.8xx

Hi all
I was reading the instructions documents of converting progress 6.10 to 8.00.8xx and found that in one of the document it says to process pending records before the conversion and the other document sent from support team with manual conversion has not mentioned anything like that.

Anyone, Can it be done without it?
What is the best way to figure out the conversion went well?
Thank you
Zuhaib