how can i delete please non-existing metricgroups (the last 6 ones signed by yellow exclamation mark on the printscreen below) from the MGMT module?
EM.log:
4/18/16 10:49:49.278 PM CEST [WARN] [main] [Manager.Bootstrap] Dashboard "XY" in management module MY_APP references invalid MetricGrouping "Servlet Session Module - LiveCount" in management module "TEST"

thank you,
stefan