Seaquel
SQL Server error code

SQL Server error 1959

SQL Server raises error 1959 at severity 16, which marks a problem with the query or data that you can correct.

Cannot create an index on a view or computed column because the compatibility level of this database is less than 80. Use sp_dbcmptlevel to raise the compatibility level of the database.
Msg1959
Severity16
Group1000–1999

Source: Database Engine events and errors