As the demo administrator on demo.dspace.org, I've attempted to create a new version of this item:
However, after creating the new version & going back into the submission process (for that new version), the following metadata fields are lost:
Each of these metadata fields has values assigned in version #1 of the Item. However, in the new version in the submission workflow, non of these existing values are pre-populated.
You can see this in action by logging in as the Admin user and visiting this new version of the item in the submission process.