Hide attribute from unbound Administration in backoffice

[Former Member]

Hello Experts,

I am trying to hide an attribute in Backoffice present in unbound section of administration tab using:

<attribute qualifier="qualifierName" type="typeName">
	<modifiers write="true" read="true" />
	<custom-properties>
        <property name="hiddenForUI">
            <value>Boolean.TRUE</value>
        </property>
	</custom-properties>
	<persistence type="property" />
</attribute>

Ran 'ant all' and server restart. Also did system update post that and reset perspective.

But attribute is still showing, and 'Hidden For UI' of that attribute does not show any value selected (neither true nor false).

Can you please help?