def METHOD_NAME():
    con = vmfakelib.Connection()
    xml1 = """
    <secret>
        <uuid>uuid 1</uuid>
        <usage type="ceph">
            <name>name</name>
        </usage>
    </secret>
    """
    xml2 = """
    <secret>
        <uuid>uuid 2</uuid>
        <usage type="ceph">
            <name>name</name>
        </usage>
    </secret>
    """
    con.secretDefineXML(xml1)
    with pytest.raises(libvirt.libvirtError) as e:
        con.secretDefineXML(xml2)
    assert e.value.get_error_code() == libvirt.VIR_ERR_INTERNAL_ERROR