Seaquel
SQL Server error code

SQL Server error 6967

SQL Server raises error 6967 at severity 16, which marks a problem with the query or data that you can correct.

Invalid type definition for type '%s'. The base and derived types must have the same value for 'mixed' unless deriving by restriction, in which case 'false' is always permitted for the derived type.
Msg6967
Severity16
Group6000–6999

Source: Database Engine events and errors