Seaquel
SQL Server error code

SQL Server error 8984

SQL Server raises error 8984 at severity 16, which marks a problem with the query or data that you can correct.

Table error: object ID %d, index ID %d, partition ID %I64d. A row should be on partition number %d but was found in partition number %d. Possible extra or invalid keys for:
Msg8984
Severity16
Group8000–8999

Source: Database Engine events and errors