We recently updated the plugin to 11.1.0 (from 10.7.0) and switched from referenceJobName to discoverGitReferenceBuild referenceJob: '...'. But since the upgrade (not sure whether the change of the reference job is relevant for this), we are getting org.jenkinsci.plugins.workflow.job.WorkflowRun ... CannotResolveClassException: sizePerSeverity, CannotResolveClassException: newSizePerSeverity (visible in Manage Old Data).