Skill Challenge ID
Some skill challenges are events, others are dialogues and some are simply items in your inventory. What would you base the ID on?
You can always make your own ID using the data provided.
I’m assuming that IDs are generally ordered by when the location was added to the map. I mean, what else would you base the waypoint/vista/task IDs on? And why not do the same for skill challenges?
Also, you can’t just assign your own ID. You could, but for all practical intents, that number would be meaningless.