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unidha TrailHead:Defining Component Attributes
First we create Lightning App which is helloAttributes.app.After that we need to create helloAttributes.cmp , it prompt error saying DUPLICATE_VALUE while I haven't create any component yet.With this error, I am not sure how to proceed with the rest.
click setup -----> in search box type "Lightning Components" there you will find the component created. I faced the same error while following trail head.
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