I have a stone Greataxe, and i wanted to upgreade it to Iron greataxe, but i can't. I have a tier 2 hammer and the hammer icon is green so i should be able to craft it, but the "Craft" button is grayed out. I can turn the Greataxe into anything from stone but not iron. I tried to make a new Iron Axe and then modifying it but it also doesn't work. Is there something that im missing?

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