If I want to make a new advancement, I can choose it's parent, but it's open a new branch...
So It would be better if I could put the new advancement between two advancements...
Pls make it!
Issue comments
If I create an advancement, and I select the story/mine_stone (example) as advancement parent, then it will open a new branch, but I want, to NOT open a new branch... I want to it fit between two existing vanilla advancements...
Sorry I misunderstood you. I don't think you can squeeze one between as vanilla advancement would need to have yours set as a parent then.
Advancement JSON format only supports parents: https://minecraft.gamepedia.com/Advancements/JSON_format
You can set existing advancement as a parent and it will branch of this advancement.