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cf44cdb082
Previously, moving a category into another one, that already had a child category of that name (but with a non-conflicting slug) would cause a 500 error: ``` # PG::UniqueViolation: # ERROR: duplicate key value violates unique constraint "unique_index_categories_on_name" # DETAIL: Key (COALESCE(parent_category_id, '-1'::integer), name)=(5662, Amazing Category 0) already exists. ``` It now returns 422, and shows the same message as when you're renaming a category: "Category Name has already been taken".