unable to see the adv_drop_count in the podlevel metrics

I am using retina in my project .
i have enabled the advance level pod metrics.
I am able to see the adv_forward_count metrics , drop_bytes, drop_count and so .
But i am unable to get the metrics of adv_drop_count . Please let me know if i have to add anything .
i have attached MetricsConfiguration file below.

```
apiVersion: retina.sh/v1alpha1
kind: MetricsConfiguration
metadata:
name: metricsconfigcrd
spec:
contextOptions:
- metricName: drop_count
sourceLabels:
- ip
- podname
- port
additionalLabels:
- direction
- reason
destinationLabels:
- ip
- podname
- port
- workload
- metricName: forward_count
sourceLabels:
- ip
- podname
- port
additionalLabels:
- direction
destinationLabels:
- ip
- podname
- port
- workload
namespaces:
include:
- default
- kube-system
```