-- One active self profile per user; soft-delete older duplicates first.

WITH ranked AS (
  SELECT id,
         ROW_NUMBER() OVER (PARTITION BY user_id ORDER BY created_at DESC, id DESC) AS rn
  FROM profiles
  WHERE relation = 'self' AND deleted_at IS NULL
)
UPDATE profiles p
SET deleted_at = now(), updated_at = now()
FROM ranked r
WHERE p.id = r.id AND r.rn > 1 AND p.deleted_at IS NULL;

CREATE UNIQUE INDEX IF NOT EXISTS idx_profiles_one_self_per_user
  ON profiles (user_id)
  WHERE relation = 'self' AND deleted_at IS NULL;