Updated to 6.2.1, reinstalled X-pack and now I see in log a lot of errors like
[2018-02-09T11:21:49,242][WARN ][o.e.x.m.e.l.LocalExporter] unexpected error while indexing monitoring document org.elasticsearch.xpack.monitoring.exporter.ExportException: java.lang.IllegalArgumentException: pipeline with id [xpack_monitoring_6] does not exist
In Kibana I see "No Monitoring Data Found"
What is wrong? How can I fix it?