Seaquel
SQL Server error code

SQL Server error 8981

SQL Server raises error 8981 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, alloc unit ID %I64d (type %.*ls). The next pointer of %S_PGID refers to page %S_PGID. Neither %S_PGID nor its parent were encountered. Possible bad chain linkage.
Msg8981
Severity16
Group8000–8999

Source: Database Engine events and errors