Null pointer on port creation

The following Null Pointer Exception is thrown when creating a Neutron Port as specified below:

<p>Problem accessing /controller/nb/v2/neutron/ports. Reason:
<pre> Server Error</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
at org.opendaylight.neutron.transcriber.NeutronPortInterface.toMd(NeutronPortInterface.java:288)
at org.opendaylight.neutron.transcriber.NeutronPortInterface.toMd(NeutronPortInterface.java:55)
at org.opendaylight.neutron.transcriber.AbstractNeutronInterface.updateMd(AbstractNeutronInterface.java:119)
at org.opendaylight.neutron.transcriber.AbstractNeutronInterface.addMd(AbstractNeutronInterface.java:102)
at org.opendaylight.neutron.transcriber.AbstractNeutronInterface.add(AbstractNeutronInterface.java:283)
at org.opendaylight.neutron.transcriber.AbstractNeutronInterface.add(AbstractNeutronInterface.java:293)

"port": [
{
"binding:host_id": "overcloud-novacompute-1",
"description": "",
"allowed_address_pairs": [],
"extra_dhcp_opts": [],
"updated_at": "2016-06-10T17:15:19",
"device_owner": "",
"port_security_enabled": true,
"binding:profile": {},
"qos_policy_id": null,
"fixed_ips": [

{ "subnet_id": "9eb9d4f7-1446-42e9-aa4d-f90b0c09919a", "ip_address": "10.100.1.48" }

],
"id": "06bbd0b0-fda8-4c40-a793-99fcc0aaa746",
"security_groups": [
{
"tenant_id": "0b18aae5ad924a01a594bd5148fc95df",
"description": "Default security group",
"id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af",
"security_group_rules": [

{ "direction": "egress", "protocol": null, "description": "", "port_range_max": null, "id": "1c105dc5-36f6-4a3a-94fe-3ef666bf2356", "remote_group_id": null, "remote_ip_prefix": null, "security_group_id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af", "tenant_id": "0b18aae5ad924a01a594bd5148fc95df", "port_range_min": null, "ethertype": "IPv4" }

,

{ "direction": "ingress", "protocol": null, "description": "", "port_range_max": null, "id": "31832742-5d34-49b9-bddb-dc4a56c98eb6”, "remote_group_id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af", "remote_ip_prefix": null, "security_group_id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af", "tenant_id": "0b18aae5ad924a01a594bd5148fc95df", "port_range_min": null, "ethertype": "IPv6" }

,

{ "direction": "egress", "protocol": null, "description": "", "port_range_max": null, "id": "d65814dd-d57f-4471-96b7-28003f792629", "remote_group_id": null, "remote_ip_prefix": null, "security_group_id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af", "tenant_id": "0b18aae5ad924a01a594bd5148fc95df", "port_range_min": null, "ethertype": "IPv6" }

,

{ "direction": "ingress", "protocol": null, "description": "", "port_range_max": null, "id": "eec6078c-e9a1-409c-84e7-fa6d675c4fa4", "remote_group_id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af", "remote_ip_prefix": null, "security_group_id": "9d3c207a-3d2a-488d-9be1-cf6387bc59af", "tenant_id": "0b18aae5ad924a01a594bd5148fc95df", "port_range_min": null, "ethertype": "IPv4" }

],
"name": "default"
}