#4 Attempting to create a duplicate category should give error.

[Stephanie Amanda Stevens]

If you create a category with the same name as another
category, the software just displays the category that
exists. It should probably give an error saying that
the category already exists, and maybe show the category.

[Rob Church]

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user_id=1312476

I prefer the silent go-to-it approach. It's the same for sites.