Steps to reproduce the problem
In SQL Server Management Studio, create a table that contains a primary key in the Table Designer tool.
Right-click the database that contains this table, and then click Properties.
In the Database Properties dialog box, click Change Tracking.
Set the value of the Change Tracking item to True, and then click OK.
Right-click the table, and then click Properties.
In the Table Properties dialog box, click Change Tracking.
On the Tools menu, click Options.
In the Options dialog box, click Designers.
Click to select the Prevent saving changes that require table re-creation check box, and then click OK.
In the Table Designer tool, change the Allow Nulls setting on an existing column.
Try to save the change to the table.
