Curious plotting issue FAQ could not address.

Hello fellow Users.

I have a fairly curious problem that I am not quite sure I understand. I
would like to plot a specific OID from out Liebert DS Aircon Unit.

What I did is this:
I edited datacollection/liebert.xml and I added:

<resourceType name="lgpEnvHumidityIdRH" label="Liebert Humidity Index">
      <persistenceSelectorStrategy
class="org.opennms.netmgt.collectd.PersistAllSelectorStrategy"/>
      <storageStrategy
class="org.opennms.netmgt.dao.support.IndexStorageStrategy"/>
    </resourceType>

      <group name="liebert-humidity" ifType="all">
        <mibObj oid=".1.3.6.1.4.1.476.1.42.3.4.2.2.3.1.3"
instance="lgpEnvHumidityIdRH" alias="lgpEnvRH" type="Integer32" />
      </group>

  <includeGroup>liebert-humidity</includeGroup>

That parts seems to have worked. The Liebert DS shows that particular
OID tree in the web-interface (see screenshot)

I then went ahead and modified:
snmp-graph.properties

to add
in the reports=