Oracle Message ORA-12017 - cannot alter primary key mview string to a rowid mview

ERRORcannot alter primary key mview string to a rowid mview
CAUSEAn attempt was made to convert the primary key of a materialized view to a ROWID materialized view.
ACTIONConversion of a primary key materialized view to a ROWID materialized view is not supported. Create a new materialized view with ROWIDs or drop and recreate the materialized view with ROWIDs.