Constituents can be merged together so that duplicate records are consolidated. Occasionally when merging records an error message regarding inserting values into specific columns is given. This prevents the records from being combined.
We're currently evaluating this issue for a fix in a future patch or service pack.
Steps to Duplicate
1. Go to Constituents > Duplicates 2. Choose Merge two constituents 3. Choose the source constituent 4. Choose the target constituent 5. Choose the Merge configuration 6. Click Merge