PostgreSQL 10 and elasticsearch 6.7

[2019-04-05T19:22:12,661][WARN ][o.e.t.TcpTransport       ] [Nd5aFRV] exception caught on transport layer [Netty4TcpChannel{localAddress=/127.0.0.1:9300, remoteAddress=/127.0.0.1:54592}], closing connection
java.lang.IllegalStateException: Received message from unsupported version: [2.0.0] minimal compatible version is: [5.6.0]
