Seaquel
SQL Server error code

SQL Server error 5242

SQL Server raises error 5242 at severity 16, which marks a problem with the query or data that you can correct.

An inconsistency was detected during an internal operation in database '%.*ls'(ID:%d) on page %S_PGID. Please contact technical support.
Msg5242
Severity16
Group5000–5999

What it means

A structural inconsistency occurred on the database page that is referenced in the error message.

Source: Database Engine events and errors