When we try to change an existing table in SQL Server 2008, you might receive a Save (Not Permitted Dialog) box pop-up. This behavior is by default and happens under the following conditions: such as adding a new column to the middle of the table, dropping a column, changing column nullability or changing the data type of a column.
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When we click the cancel button we receive another dialog as in the following:
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Solution
To add a column to turn off the "Saving changes not permitted" dialog box, so that you don't have to recreate a table in order to save changes to the table, follow these SQL Server 2008 configuration instructions:
On the Tools menu, click Options.
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When we click on the option, the option window will be displayed:
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In the Options pop-up box select designers.
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Uncheck the check box of the option that prevents saving changes that require the table to be re-created:
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