Can you be more explicit?
What kinds of changes?
Do you mean that data in the records actually changes? For example, answer A to question 73 changes from "yes" to "maybe"? Or do you mean that new records (new questions, new answers) are added?
And what defines "correct combination of the data" in your mind?
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.