Oracle Error Message
ORA-39284: Cannot alter the list values of a list subpartition: string
Reason for the Error
DBMS_METADATA_DIFF was comparing two tables subpartitioned by list, one of which has a subpartition with the same name but a different values list as a subpartition in the other. There is no SQL ALTER statement to change the list values of a list subpartition.
Solution
The difference cannot be eliminated with an SQL ALTER statement.