ORA-26563: renaming this table is not allowed

admin

ORA-26563: renaming this table is not allowed
Cause: Attempt to rename areplicated table, an updatable materialized view
table or the master table of a materialized view for which a materialized viewlog
has beencreated.
Action: If desired,unregister the replicated table with dbms_repcat.drop_master_
repobject, or use the recommended procedure to rename the master table of a
materialized view.