Create a duplicated Marketing List entity?

Hi! A question: can I create a duplicated Marketing List entity? The native entity presents an error:

<Message>System.Xml.XmlException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #4A6B010E</Message>
<Timestamp>2015-08-06T20:40:01.4256383Z</Timestamp>
<InnerFault>
<ErrorCode>-2147220970</ErrorCode>
<ErrorDetails xmlns:d3p1="schemas.datacontract.org/.../System.Collections.Generic">

</ErrorDetails>
<Message>Privilege Type Read not defined on entity 'ListMember'.</Message>

Then, my idea is duplicate a native Marketing List entity to work with it.

Any another option? It's welcome!

Regards.