Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).
Tables can contain a maximum of 1024 columns that are not designated as sparse, or computed. When sparse columns cause the table to exceed 1024 columns, a column set must be defined for the table. The table referenced has more than 1024 columns and you have attempted to remove the column set.