SQL Server Error Code – 666 the maximum system-generated unique valu

In this blog post, you’ll learn more about the SQL Server Error Code 666 and the error message description that is shown

SQL Server Error Code

666

SQL Server Error Description for the Code :666

The maximum system-generated unique value for a duplicate group was exceeded for index with partition ID %I64d. Dropping and re-creating the index may resolve this; otherwise, use another clustering key.