Seaquel
SQL Server error code

SQL Server error 8921

SQL Server raises error 8921 at severity 16, which marks a problem with the query or data that you can correct.

Check terminated. A failure was detected while collecting facts. Possibly tempdb out of space or a system table is inconsistent. Check previous errors.
Msg8921
Severity16
Group8000–8999

Source: Database Engine events and errors