@Darren_Murphy , @Jeff_Hager - I implemented the approach you explained and it works like a charm. You saved me quite some work and updates 
Thank you so much.
Infact, I faced the issue of duplicate items in my collection. One of your past post helped me fix that as well. Thanks for that too.
Just that, I need to fix a thing, the action on which I load the required values in Users table, I need to rework a bit there.
Overall, great solution! 