Patch "copy" and "Move" operations are documented in this section of the integrator's guide.
They should work even when the target property exists, but currently they both fail.
1) For Patch Copy
- Create a user with properties mail and another_mail
- copy property mail to another_mail
2) for Patch Move
- Create a user with properties source_property and target_property
- copy property source_property to target_property