ORA-23346: primary key or object ID is undefined for table or materialized view string

oracle

ORA-23346: primary key or object ID is undefined for table or materialized view string
Cause: Trying to generate replication support for a table or materialized view without a primary key (as defined by a constraint or dbms_repcat.set_columns) or an object ID
Action: For a table, add a primary key constraint or define a primary key using dbms_repcat.set_columns or use object tables. For a ROWID materialized view, set min_communication to false or use primary key or object ID materialized views

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