Oracle : Ошибка ORA-39301

"Cannot alter values recorded in materialized view log: %s"
*Cause: DBMS_METADATA_DIFF was comparing two materialized view logs
that are recording different values, and the set of values
in the first materialized view log cannot be changed to that
in the second materialized view log.
The error message identifies the specific problem.
*Action: The difference cannot be eliminated with an SQL ALTER statement.

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