Seaquel
SQL Server error code

SQL Server error 5540

SQL Server raises error 5540 at severity 16, which marks a problem with the query or data that you can correct.

The FILESTREAM column cannot be used with method %ls because the associated ROWGUIDCOL of the base table is nullable or does not have a unique constraint.
Msg5540
Severity16
Group5000–5999

Source: Database Engine events and errors