Hitting error - Ignoring Netflow version v10

Elastic Stack Logstash
5

Thanks a lot Mark. I upgraded to 5.2 and it works like a charm. I have pasted the output below for completeness. Thanks a million!
{
"netflow" => {
"destinationIPv4Address" => "10.5.6.7",
"sourceIPv4Address" => "10.1.2.3",
"version" => 10
},
"@timestamp" => 2017-02-06T19:46:38.000Z,
"port" => 37854,
"@version" => "1",
"host" => "127.0.0.1",
"type" => "ipfix"
}
{
"netflow" => {
"destinationIPv4Address" => "10.5.6.6",
"sourceIPv4Address" => "10.1.2.4",
"version" => 10
},
"@timestamp" => 2017-02-06T19:46:38.000Z,
"port" => 37854,
"@version" => "1",
"host" => "127.0.0.1",
"type" => "ipfix"
}