Hello Umair Hassan and welcome to the club of people who have problems after updating. You are not alone.
Unfortunately I cannot tell you how to fix this. If we are lucky, the devs will shed some light on this. Until then we have to be patient and try to find workarounds. Which means we have to invest a lot of time that nobody pays us for.
You could post a new tracker item about your problem in the
bug tracker. Maybe this will make the developers aware of the problem so they can hopefully fix it.
@Codigo Alberto
Why should a field be missing when it worked fine before the update? This would mean that the field got lost during the update.
I had a phenomenon that settings for a List&Serach type got lost during an update of Seblod and I lost my pagination links. I had to go through a lot of settings until I found the cause for the problem.