Seaquel
SQL Server error code

SQL Server error 6227

SQL Server raises error 6227 at severity 16, which marks a problem with the query or data that you can correct.

Type "%.*ls.%.*ls" is marked for native serialization, but field "%.*ls" of type "%.*ls.%.*ls" is of type "%.*ls.%.*ls", which is not blittable, or type "%.*ls.%.*ls" has a recursive definition.
Msg6227
Severity16
Group6000–6999

Source: Database Engine events and errors