When attempting to merge two constituent records, a user may receive Error: Data could not be saved. The UPDATE statement conflicted with the CHECK constraint "CK_SECONDARYFUNDRAISER_VALIDCONSTITUENT". The conflict occurred in database "23695P_cd4d1fc9-53ab-499b-aefa-3035f9e418f8", table "dbo.SECONDARYFUNDRAISER".
Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.