SQL SERVER MSSMS Error "Saving Changes is not Permitted."
To fix this error in SSMS: At the top right of your studio go to Tools > Options.
Click on Designers and uncheck "Prevent Saving Changes that require table re-creation".
FYI, you should understand the implications of dropping and recreating your tables and this isn't always the best option for making table alterations.
SQL SERVER MSSMS Error "Saving Changes is not Permitted."
Saving changes not permitted error thrown when the designer option in managment studio is checked to not allow changes.