OpenShift 3.6 Issues with Hard-Pruning

Issue

During hard pruning following the documentation [1] 2 issues preventing the operation to succeed

Issue 1:
1107 17:53:15.502689 235 round_trippers.go:414] Content-Type: application/json
I1107 17:53:15.502699 235 round_trippers.go:414] Content-Length: 248
I1107 17:53:15.502708 235 round_trippers.go:414] Date: Wed, 07 Nov 2018 17:53:15 GMT
I1107 17:53:15.502718 235 round_trippers.go:414] Cache-Control: no-store
I1107 17:53:15.502746 235 request.go:991] Response Body: {"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"imagestreams.image.openshift.io \"devimage\" not found","reason":"NotFound","details":{"name":"devimage","group":"image.openshift.io","kind":"imagestreams"},"code":404}
I1107 17:53:15.509421 235 request.go:782] Error in request: invalid resource name "dev-project-exporter/dev-project/dev_projectexporter_java": [may not contain '/']
ERRO[0338] failed to get the image stream certificates/ev-project-exporter/dev-project/dev_projectexporter_java: invalid resource name "ev-project-exporter/dev-project/dev_projectexporter_java": [may not contain '/']
Would delete 0 blobs

In 3.9 we added a restriction so you can't upload blobs into the repository with an invalid name: bug 1528613.
The registry stores repositories in /docker/registry/v2/repositories/. It is safe to remove repositories with invalid names from this directory.

Issue 2:
1120 16:43:42.473167 721 request.go:991] Response Body: {"kind":"ImageStream","apiVersion":"v1","metadata":{"name":"openshift-hello","namespace":"monitoring-clustercheck","selfLink":"/oapi/v1/namespaces/monitoring-clustercheck/imagestreams/openshift-hello","uid":"4f3845aa-ece3-11e8-83ad-40f2e91e200b","resourceVersion":"582035967","generation":1,"creationTimestamp":"2018-11-20T16:42:46Z","labels":{"app":"openshift-hello"},"annotations":{"openshift.io/generated-by":"OpenShiftNewApp"}},"spec":{"lookupPolicy":{"local":false}},"status":{"dockerImageRepository":"173.20.149.84:5000/monitoring-clustercheck/openshift-hello","tags":[{"tag":"latest","items":[{"created":"2018-11-20T16:43:00Z","dockerImageReference":"173.20.149.84:5000/monitoring-clustercheck/openshift-hello@sha256:0bd4a9f017e91e8f7621a85f7a355025a7125ccb5cc5f79e36b7ee9b04107857","image":"sha256:0bd4a9f017e91e8f7621a85f7a355025a7125ccb5cc5f79e36b7ee9b04107857","generation":1}]}]}}
ERRO[0819] failed to prune manifest links in the repository monitoring-clustercheck/openshift-hello: invalid checksum digest format

[1]
https://access.redhat.com/documentation/en-us/openshift_container_platform/3.6/html/cluster_administration/admin-guide-pruning-resources#hard-pruning-registry