CONDITION YES/NO

[mastcorp]

When we have a condition yes/no and we are making a change in the application, the result of the condition is going to change afrer synchronizing it. How to avoid this and show the right result all the time? 

[SkrOYC]

Your question is quite vague.

We have no idea how your app is, what it's ment for, how you build it, what are you expecting from that Y/N field.
It's a machine, the result is always right because you tell it to do so. If the result is different from what you expect, is because you didn't translate your need to the machine correctly 👨🏽‍💻

[WillowMobileSys]

I'll assume you mean the expression is changing in such a way that some pre-existing rows current Yes/No result will be impacted and you don't want that.  Meaning you want the older rows to continue following the same expression that originally set their Yes/No value.

I'll also assume you have a Date when this change is being made and that there is some Entry Date on the row.  To accomplish the goal suggested above you would do this as the expression:

If([Entry Date] < "Expression Changeover Date",
   <<old expression>>,
   <<new expression>>
)

This is just a pseudo example.  You obviously would replace the pieces of the expression with those appropriate for your use case.