Manually move the gift from the incorrect constituent and add to the correct constituent record.

OR

Adjust the gift to $0.00.  Be sure to include the reason why the gift was adjusted to $0.00 in the adjustment note section (example:  Gift incorrectly applied to Robert Hernandez, Sr.'s record -- it has been manually added to the correct record of Robert Hernandez, Jr.).

OR

Delete the gift from the incorrect constituent and manually add the gift to the correct constituent record.