Restore a backup from another Camunda into a running one

We are strugling to upgrade our Camunda, and Stakeholders are requiring functionality that is only available in a newer version.
Can I start my Production environment in Camunda 8.4, clean, with no data, and later on finish my upgrade in my old paralell Production (that has data) update from 8.1 to 8.4, backup it’s data and restore in this new Camunda 8.4 production that is running?