I tri to add weapons from Spartan Weaponary mod and Epic Knight, when i add both mod weapons minecraft give me an error
latest.log
crash-2022-04-30_21.55.36-fml.txt
epicfight.txt
I made the config .txt because .toml don't let me upload.

Table with path [custom_weaponry, spartan_flanged_mace_netherite] has been declared twice.

Well, it looks like you declared the same name of the item twice.

When i try to use one at a time, it's work
epicfight (2).txt
knightly-armory_epicfight.txt

yeah you have to remove duplicated "spartan_flanged_mace_netherite" item. there's no "spartan_flanged_mace_netherite" in the config file you've posted

Thank you so much, i tried to solve this problem for some weeks!