Get-job, create-job from old jenkins version to latest - meaning of error

getting an manage old data exceptions for several of the created jobs
CannotResolveClassException: workspaceName, CannotResolveClassException: workspaceName
CannotResolveClassException: hudson.plugins.octopusdeploy.OctopusDeployPushRecorder

What should i be looking for in those jobs?

You might be missing one or more plugins. e.g. hudson.plugins.octopusdeploy.OctopusDeployPushRecorder indicates that the octopusdeploy plugin is missing or too old.
Don’t know where workspaceName comes from, you might be able to see from the context in the xml where this is reported to which plugin this belongs.