im kinda new to datapack making and i have a problem with crafting

i have some lines of code here that says its perfectly ok however if i try to craft it, it doesnt work.
Heres the code
{
    "type": "minecraft:crafting_shaped",
    "pattern": [
        " # ",
        "NEN",
        "ONO"
    ],
    "key": {
        "#": {
            "item": "minecraft:diamond_block"
        },
        "N": {
            "item": "minecraft:netherite_scrap"
        },
        "E": {
            "item": "minecraft:chain_command_block",
            "tag": "customtag:tech_chip_1"
        },
        "O": {
            "item": "minecraft:obsidian"
        }
    },
    "result": {
        "item": "minecraft:knowledge_book",
        "count": 1
    }
}