PLS-00716

Error: PLS-00716: Attribute/method 'string' can occur only once in an ALTER TYPE statement

Causa: User attempted more than one of ADD, DROP, or MODIFY on an attribute in a single ALTER TYPE statement. User attempted more than one of ADD or DROP on a method in a single ALTER TYPE statement.

Acción: Do only one ADD, DROP, or MODIFY for an attribute in a single ALTER TYPE statement. Do only one ADD or DROP for a method in a single ALTER TYPE statement.