How to reset a challenge/mission?

[RudeySH]

I'm trying to reset the DLC mission "Laid to Rust" because it is glitched and can no longer be progressed in my save file.

Here's what I've found so far.

In the "Raw" tab, under "ChallengeDatas", I've found the mission that I want to reset.

Unfortunately, simply unchecking the IsActive checkbox does not appear to do anything, because when I load my save in game, the mission is still active and glitched.