Which file is it in? I want to fix it quickly.
P.S. Oh, it's in XML? I thought the check was in .py files

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P.P.S. Am I missing something? Why is there OPHELIA and OPHELIA2? Isn't it too confusing, why not to rename the tag?
When you include a new art in XML, don't forget to include a unit in FPK as well

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P.S. And don't forget to include Elohim scouts, adepts, hunters, longbowmen, mages, horsemen, horse archers, chariots, champions and axemen along with the archers. You basically forgot to include any new elohim art at all.