Try each of the following steps in order until the issue is resolved:

  1. Ensure you are logged in as Supervisor or you have security rights to merge constituents
  2. Switch the order in which the constituents are being merged. For example, if Constituent A was originally the Merge From (source) constituent and Constituent B was originally the Merge To constituent, make Constituent B the Merge From constituent and Constituent A the Merge To constituent.
  3. Perform separate constituent merges for each part of the record, such as Relationships and Gifts, instead of performing the entire merge at once
  4. If you originally marked Delete source constituent, unmark this checkbox before performing the merge. Once the merge is complete, manually delete the source constituent.
  5. If the constituents have a relationship with each other, delete the relationship before merging.
  6. If one or both of the Constituents are marked as a Solicitor, remove the checkbox on Bio1 tab for "Is a solicitor".