patch 16226394 - CREATE UNIQUE INDEX BOM.BOM_STRUCTURES_B_U1 unique keys error

patch 16226394 results in error:

CREATE UNIQUE INDEX BOM.BOM_STRUCTURES_B_U1 ON BOM.BOM_STRUCTURES_B

  (OBJ_NAME, PK1_VALUE, PK2_VALUE, ALTERNATE_BOM_DESIGNATOR) LOGGING STORAGE

  (FREELIST GROUPS 4 FREELISTS 4 ) PCTFREE 10 INITRANS 11 MAXTRANS 255

  COMPUTE STATISTICS  TABLESPACE APPS_TS_TX_IDX

Statement executed.

AD Worker error:

The index cannot be created as the table has duplicate keys.

Use the following SQL statement to identify the duplicate keys:

SELECT OBJ_NAME, PK1_VALUE, PK2_VALUE, ALTERNATE_BOM_DESIGNATOR, count(*)

   FROM BOM.BOM_STRUCTURES_B

GROUP BY OBJ_NAME, PK1_VALUE, PK2_VALUE, ALTERNATE_BOM_DESIGNATOR

    HAVING count(*)>1

AD Worker error:

Unable to compare or correct tables or indexes or keys