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.
- Launch SQL Management Studio
- Clink menu “Tools > Options”
- Expand menu “Designers” and uncheck box “Prevent saving changes that require table re-creation.”