SQL Server Error Code – 6991 invalid restriction for type ‘%s’. if th

In this blog post, you’ll learn more about the SQL Server Error Code 6991 and the error message description that is shown

SQL Server Error Code

6991

SQL Server Error Description for the Code :6991

Invalid restriction for type ‘%s’. If the base type has empty content, then the derived type must as well, and if the derived type has empty content, then the base type must be emptiable.

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