Adding new items.

I'm trying to add a new item, but it doesn't seem to work. Here is the code inside "npc_items_custom.txt":

I've tried to make this item salable in the secret shop, but it doesn't work.

PS: I've noticed that in Barebones it uses "PrecacheItemByNameSync", which says that "Precaches a DOTA item by its dota_npc_items.txt name". Does it means that I need to add the new item there too?