Seaquel
SQL Server error code

SQL Server error 1776

SQL Server raises error 1776 at severity 16, which marks a problem with the query or data that you can correct.

There are no primary or candidate keys in the referenced table '%.*ls' that match the referencing column list in the foreign key '%.*ls'.
Msg1776
Severity16
Group1000–1999

Source: Database Engine events and errors