See the Drag/drop of the pivot grid 'Data' field does not allow dropping as expected ticket for details.
Compact layout - A field header cannot be dragged to precede the data field anchor located in the column header area
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.