Custom durability item in GUI

[vaxjo]

Hello,
I come back to MC and i have problem with this:

on npc right click:
    if citizen is 1:
        open "CHEST" with 3 rows named "&8Kovář" to player
        wait a tick
        set slot 2 of player's current inventory to a unbreakable diamond_hoe with custom nbt "{HideFlags: 4}" named "&atest" with lore "asdasdasd"

I mean i have okey this, but, i right click to npc, and its work, but item its not show

But show this error:

[16:57:46 ERROR]: a slot can't be set to 'a unbreakable diamond_hoe:2 with custom nbt "{HideFlags: 4}" named "&atest" with lore "asdasdasd"' because the latter is neither an item type nor an item stack (kovar.sk, line 5: set slot 2 of player's current inventory to a unbreakable diamond_hoe:2 with custom nbt "{HideFlags: 4}" named "&atest" with lore "asdasdasd"')

Thank you for help, and have a nice day =)