RHEV SDK/API: HostNic's attach network doesn't work with VLAN tagged networks

Issue

If I use the web admin portal to add an additional VLAN-tagged network to an interface it works; however, I've been unable to get this to work in the API.

I am using the attach method of the HostNICs class to associate the VLAN-tagged network with the bond0 interface.

Here is a simple code snippet (using the rhevm-sdk):

api = API(url=URL, username="admin@internal", password="rootme", insecure=True)

nic = api.hosts.get('host11').nics.get('eth1')
network = api.clusters.get("test").networks.get(name='net2')

nic.attach(params.Action(network = network))

I get the following output:

status: 400
reason: Bad Request
detail: The Network Interface is already attached to a Logical Network.