Hello,
You can copy attributes from one entity to the other entity, with the help of copyAttributes java action in Community Commons module (https://marketplace.mendix.com/link/component/170)
In your scenario, Target object will be HelperEntity. Source Object is CurrentStatus entity.
To overcome the duplicates, before creating NewHelperEntity, do a validation check whether the CurrentStatus object data has already copied to HelperEntity or not.
Hope this helps!