Error when merging two converted constituents

When trying to merge two converted constituents, you receive an error stating: "data could not be saved. Subquery returned more than 1 value. This is not permitted when the subquery follow =, or when the subquery is used as an expression".
This is because the converted constituent has multiple records within USP_MERGETASK_CONSTITUENTMAJORGIVING.

We're currently evaluating this issue for a fix in a future patch or service pack.  

Steps to Duplicate

1) Open "Merge Two Constituents"
2) For Source Constituent, use one of the duplicate records
3) For Target Constituent, use the other duplicate record
4) Mark "Mark source constituent inactive"
5) For inactive reason, select "Duplicate - Duplicate Record"
6) Click Merge. See error "data could not be saved. Subquery returned more than 1 value. This is not permitted when the subquery follow =, or when the subquery is used as an expression"
 

Environment

 Blackbaud CRM
 4.0
 4.0.178

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