Sometimes when you done changes in table columns and save, you will get the below error
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.
To resolve this issue simple do the below two setps.
- Goto "Tools" -> Open "Options"
- Select "Designers" -> "Table and Database Designers" and Uncheck the checkbox "Prevent saving changes that require table re-creation" and click "OK"