It is the same issue that affects the AMQ Broker when installed in openshift-operators. Downstream it runs as jboss, so it is deprived of permission to write to its PVC.

{{java.util.concurrent.ExecutionException: io.vertx.core.file.FileSystemException: java.nio.file.AccessDeniedException: /var/lib/hono/device-registry/tenants.json
Caused by: io.vertx.core.file.FileSystemException: java.nio.file.AccessDeniedException: /var/lib/hono/device-registry/tenants.json
Caused by: java.nio.file.AccessDeniedException: /var/lib/hono/device-registry/tenants.json}}