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SELECT
  P.ID PROPERTY_ID,
  V.VALUE ARTNUMBER,
  B.NAME IBLOCK_NAME,
  GROUP_CONCAT(V.IBLOCK_ELEMENT_ID SEPARATOR "\n") ELEMENTS_ID,
  GROUP_CONCAT(E.NAME SEPARATOR "\n") ELEMENTS_NAME,
  GROUP_CONCAT(E.ACTIVE SEPARATOR "\n") ELEMENTS_ACTIVE,
  COUNT( * ) COUNT
FROM
  b_iblock_element_property V
  LEFT JOIN b_iblock B
    ON
      B.IBLOCK_TYPE_ID = 'xmlcatalog'
        AND
      -- Каталог рус
      B.CODE = ''
      -- Каталог укр
      -- B.CODE = 'catalog_ua'
  LEFT JOIN b_iblock_property P
    ON
      P.CODE = 'ARTICLE'
        AND
      P.IBLOCK_ID = B.ID
  LEFT JOIN b_iblock_element E
    ON
      E.ID = V.IBLOCK_ELEMENT_ID
WHERE
  V.VALUE != ''
    AND
  V.IBLOCK_PROPERTY_ID = P.ID
GROUP BY
  V.VALUE
HAVING
  COUNT( * ) > 1
ORDER BY
  IBLOCK_NAME ASC,
  ARTNUMBER ASC;
                                 
        
Оказывается "1С-Битрикс: Управление сайтом 8.5.1"