Help: Field values disappearing

Help: Field values disappearing

Hello,

I have a form A in which the name, registration number and other details of a student are stored.
I have another form B in which the name and registration number are imported from form A and marks of the student are stored.

I have a grid view based on form B in which I take the imported name and registration number from form A, and the marks from form B.

As a result, in the view, the name and registration number are "non-editable" [since they are imported from form A] where as the marks are editable. I can just update the marks and click save [since it is a grid view]

Problem:
Names and registration number of 5 records disappeared a few weeks back - the imported values in form B. They were blank. The marks were retained but just blank values for names and registration number.

I couldnt figure out the reason, but deleted the records and entered the student data again by importing the student registration number.

Now again, the name and registration number for 1 record is blanked out in form B. The marks are retained. I dont know how it has been edited out when there are no edit permissions on the name and registration number on the view. 

I am afraid of this scenario repeating and it is not possible to recreate the data over and over again.

Usage scenario:
This view is made public and the link is shared with a set of people who are entering marks at the same time. Could this be the reason for this error creeping up?


Please help as soon as possible.

Thanks a lot