SQL Server Error Msg 1776. There are no primary or candidate keys in the referenced table that match the referencing column list in the foreign key.
This error occurs when DBA tries to create an FK reference while the column on the parent table is neither PK nor UNIQUE.
For complete and quick analysis with example, Go through Link – http://mssqlcorruptiontackle.blogspot.com/2010/12/sql-server-2008-r2-foreign-key-delete.html
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