Currently if you are buying a recipe off the TP, if you have the craft on your character it is shown in green. If it not your craft it is in white. Proposal: If it not your craft have the writing for tailor / weapon-smith etc in red.
Clearly it was meant to have it in green to show you have it, so I can not see a reason to have a simple warning system like that to prevent people from buying stuff they cant use accidentally.
Red is used for the case where you do have the craft, but it’s not yet of high enough level.
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