Oracle Message ORA-12091 - cannot online redefine table string.string with materialized views

ERRORcannot online redefine table string.string with materialized views
CAUSEAn attempt was made to online redefine a table that had materialized views defined on it or had a materialized view log defined on it or is a master.
ACTIONDrop all materialized views and materialized view logs before attempting to online redefine the table.

741478FAQ: Materialized views