HR Import 1.0 and Data Mapping 1.0 have been retired as of Dayforce Release 2025.1.0. All customers using the old version have been migrated to the new HR Import 2.0 and Data Mapping 2.0 functionality. As part of this update, the HR Import/HR Recruiting and Data Mapping Version client property has been removed from the Properties tab in System Admin > Client Properties.
See item HR-38165 in the release notes for 2025.1.0.