ORA-22857: cannot modify columns of object

admin

ORA-22857: cannot modify columns of object tables
Cause: An attempt was madeto alter the object table by modifing existing
columns. An object table cannot be altered to modify existing columns since itis
based on an object type. The table definition must be in sync with the
corresponding type.
Action: Create a new typewith the desired attribute types and use it to create an
object table. The new object table will have the desired columns.