| ERROR | updatable materialized view log is not empty, refresh materialized view |
| CAUSE | The updatable materialized view log was not empty. The updatable materialized view log must be empty before an updatable rowid materialized view can be altered to a primary key materialized view. |
| ACTION | Ensure that updatable materialized view log is empty by refreshing the materialized view before converting the updatable ROWID materialized view to a primary key materialized view. |