Hello! I am trying to save data in files, for each player, and because i just need to store the data if it is meaningful, to avoid using too much storage, I wanted to only save what I need. I did this: Code (Java): for(Thing t : list) if(t.shouldSave()) yaml.set("Thing List." + t.toString(), t.getData()); The problem I'm having is that maybe the first time I want to save it, which would give me this bit of YAML: Code (YAML): Thing List: THINGA = 'Data 1' THINGB = 'Data 2' but then, the second time, when I won't want to re-save it, so with my boolean .shouldSave() I won't write the data, but because it already exists in the file, I won't be deleted, so I end up storing a bunch of data that I don't need to store, and I can't manage to delete it... I've searched in the Spigot Javadocs, but didn't manage to find anything to delete data from a YamlConfiguration... Thanks for helping!