I do have some problem regarding saving changes when I’m going to modify my table. I’m using user defined default in my fields. I’m wondering that the reason why I can’t modify my table because I’m using user defined default. When click the save button I always encounter this error message

There’s an option in SQL Server Management Studio to prevent you from doing changes that require a table to be rebuilt from scratch.
Go under
Tools > Options > Designersand find the checkboxPrevent saving changes that require table re-creationand uncheck that checkbox.It’s not a bug – it’s a feature! 🙂