Seaquel
SQL Server error code

SQL Server error 5326

SQL Server raises error 5326 at severity 15, which marks a problem with the query or data that you can correct.

The data in the data file does not conform to the UNIQUE hint specified for the BULK rowset '%.*ls'. The data in the data file must be unique if the UNIQUE hint is specified for a BULK rowset. Remove the UNIQUE hint, or update the input data file to ensure that the data is unique.
Msg5326
Severity15
Group5000–5999

Source: Database Engine events and errors