def create_attachment_circuit(self, context, attachment_circuit):
        attachcircuit = (super(MPLSVPNDriverPlugin, self).
                         create_attachment_circuit(context,
                                                   attachment_circuit))
        return attachcircuit
Call super to create row in DB.
dataset/ETHPy150Open openstack/networking-edge-vpn/neutron/neutron/services/mplsvpn/plugin.py/MPLSVPNDriverPlugin.create_attachment_circuit