Do i need to redo all configuration after firmware update?

any though on this will appreciated. im afraid facing another problem again.

I am using a Pixhawk 1(2.4.x). I have updated firmware many times and never had to reloa or change configuration. It comes over perfectly. As a safeguard, you should save your parameters to a file, of course.

Of course, there could be an enhancement in the updated firmware that requires ADDITIONAL configuration.