Exploitable Bug: Iron Wakizashi Spell Failure

[Elurion]

Description of Bug Experienced:
Crafting an iron wakizashi produces an item with -5% arcane spell failure. Should be +5%.

Steps to reproduce the Bug:
Crafting an iron wakizashi

Expected Result:
Iron wakizashi with +5% arcane spell failure.

Actual Result:
Iron wakizashi with -5% arcane spell failure.

Screenshot(s)
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Additional Information/Notes