Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can’t be re-created or enabled the option Prevent saving changes that require the table to be re-created.
Did you ever got this warning dialog box, when you try to save a Table after modifying through design-view in Sql Server 2008. You will encounter this with fresh installation of Sql Server and when tried to save an already created Table, after modification.
That’s because when you do Table modifications through the Design-View, tables are internally dropped and re-created. The reason why you get this error! However, you can by-pass this error by deselecting - Prevent saving changes that require table re-creation from Tools –> Options –> Designers. Check the below screenshot.
Hope this helped.