Hello! I am creating a modpack and I want the players to spawn with specific items and the On Rose Gold book spawns. Is there a way to stop the book from spawning with the player? I can't find anything in the config.

I have two possible fixes in mind: you can either modify the loot table books/rose_gold to be empty, or modify the achievement recipes/misc/rose_gold_ingot_smelting to not grant a reward.
But the spawning of the book was a bug anyways so that's fixed in the next version, thanks for reporting :)