Seaquel
SQL Server error code

SQL Server error 1126

SQL Server raises error 1126 at severity 14, which marks a problem with the query or data that you can correct.

Table error: Page %S_PGID. Test (%ls) failed. Slot %d, offset 0x%x overlaps with the prior row.
Msg1126
Severity14
Group1000–1999

Source: Database Engine events and errors