An error occurred before executing the process 'Global Change Process' : Data could not be saved. The UPDATE statement conflicted with the CHECK constraint "CK_CONSTITUENCY_ISUNIQUE". The conflict occurred in database "DATABASE", table "dbo.CONSTITUENCY".
The error occurs when processing the add user-defined constituency and a constituent record has two of the same constituencies without overlapping dates.
Workaround: Remove the constituent from the selection being used in the global change OR Delete one of the duplicate constituencies from the constituent's record
Steps to Duplicate
Go to a constituent record
Select Personal Info > Constituencies
Add two Constituencies that are the same and ensure the dates do not overlap
Go to Administration> Global Change
Add a new add user-defined constituency global change
Create a selection that includes the record
Select the same constituencies and dates that do not overlap with whats's on the record
Mark both boxes at the bottom
Select Save and Process the global change-see error