OrientDB ALTER PROPERTY affects super class and all other descendant classes? - orientdb

Question

I was experimenting with inheritance with 2.1.16 and noticed when ALTER PROPERTY is used on a child class to alter an inherited property, the schema is altered for the superclass and all descendants of that superclass. In the following example, B extends A. C extends A. B alters mandatory/notnull for a property inherited from A. The schema change impacts A, B, and C.
Is this the expected behavior for altering inherited properties (at least as far as mandatory/notnull are concerned)? If so, is there an approach for making child classes more/less restrictive or is it intentional the class schema will be identical across all inherited child classes?
Result below is identical regardless of whether A is abstract or not.
CREATE CLASS A Extends V ABSTRACT;
CREATE PROPERTY A.Name STRING;
CREATE PROPERTY A.Description STRING;
CREATE CLASS B Extends A ;
ALTER PROPERTY B.Name MANDATORY TRUE;
ALTER PROPERTY B.Name NOTNULL TRUE;
CREATE CLASS C Extends A ;
CREATE VERTEX C CONTENT { "Description": "Hello" };
Yields the following message even though C extends A, not B:
The field 'A.Name' is mandatory, but not found on record: C{Description:Hello}
with class properties showing mandatory/notnull true for all three Name properties:
CLASS 'A'...
PROPERTIES
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
NAME | TYPE | LINKED TYPE/CLASS | MANDATORY | READONLY | NOT NULL | MIN | MAX | COLLATE |
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
Name | STRING | null | true | false | true | | | default |
Description | STRING | null | false | false | false | | | default |
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
orientdb {db=AdvRepos}> info class B
CLASS 'B'...
PROPERTIES
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
NAME | TYPE | LINKED TYPE/CLASS | MANDATORY | READONLY | NOT NULL | MIN | MAX | COLLATE |
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
Name | STRING | null | true | false | true | | | default |
Description | STRING | null | false | false | false | | | default |
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
orientdb {db=AdvRepos}> info class C
CLASS 'C'...
PROPERTIES
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
NAME | TYPE | LINKED TYPE/CLASS | MANDATORY | READONLY | NOT NULL | MIN | MAX | COLLATE |
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+
Name | STRING | null | true | false | true | | | default |
Description | STRING | null | false | false | false | | | default |
-------------------------------+-------------+-------------------------------+-----------+----------+----------+-----------+-----------+----------+