How to use a name including underscore or upper-case for KafkaTopic yaml

Issue

• How to use a name including underscore or upper-case for KafkaTopic yaml?
• For example, in case of using "sample_InvalidName_topic" as a topic name,

# kafkatopic.yaml           
apiVersion: kafka.strimzi.io/v1beta1
kind: KafkaTopic
metadata:
  name: sample_InvalidName_topic
  labels:
    strimzi.io/cluster: my-cluster
spec:
    ...

$ oc apply -f kafkatopic.yaml                                                                                      
The KafkaTopic "sample_InvalidName_topic" is invalid: metadata.name: Invalid value: "sample_underbar_topic": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')