Seaquel
SQL Server error code

SQL Server error 5521

SQL Server raises error 5521 at severity 16, which marks a problem with the query or data that you can correct.

Error 0x%x (NT status code) was encountered when SQL Server attempts to retrieve '%.*ls' from the Transaction File System Resource Manager located at '%.*ls'.
Msg5521
Severity16
Group5000–5999

Source: Database Engine events and errors