This is not done in the config anymore. The entries exist in the config SOLELY so existing users can update to the new data system!

READ THE PATCH NOTES. The patch notes exist so I don't have to answer the same question repeatedly...............

Edit loot in oxide/data/RaidableBases/ subdirectories or the Default_Loot.json - use Default_Loot.json as an example, or type rb.populate all 

Edit bases in oxide/data/RaidableBases/Profiles/

DO NOT EDIT LOOT IN THE PROFILES

Use Default_Loot.json for an example on how to add or edit items. Just copy/paste it into the loot files you want to use and edit it from there.

If you want to start by editing all items in the game then type rb.populate all and these files will be put in the oxide/data/RaidableBases/Editable Lists directory