ORA-23435: cannot create an updatable ROWID

admin

ORA-23435: cannot create an updatable ROWID materialized view with LOB
columns
Cause: The propagation ofLOB data from materialized view sites to the master
site requires a primary key on the replicated table. Thus updatable ROWID
materialized views that contain LOB columns are not supported.
Action: Create a primary keymaterialized view instead of a ROWID materialized
view. If the materialized view already exists, it can be converted to a primarykey
materialized view using the ALTER MATERIALIZED VIEW DDL command.