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SQL Server error code

SQL Server error 3949

SQL Server raises error 3949 at severity 16, which marks a problem with the query or data that you can correct.

Transaction aborted when accessing versioned row in table '%.*ls' in database '%.*ls'. Requested versioned row was not found because the readable secondary access is not allowed for the operation that attempted to create the version. This might be timing related, so try the query again later.
Msg3949
Severity16
Group3000–3999

Source: Database Engine events and errors