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SQL Server error code

SQL Server error 8993

SQL Server raises error 8993 at severity 16, which marks a problem with the query or data that you can correct.

Object ID %d, forwarding row page %S_PGID, slot %d points to page %S_PGID, slot %d. Did not encounter forwarded row. Possible allocation error.
Msg8993
NameDBCC3_MISSING_FORWARDED_ROW
Severity16
Group8000–8999

What it means

A forwarding row in a heap points to a nonexistent forwarded row.

Source: Database Engine events and errors