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sql - "Save changes is not permitted" when changing an existing column to be nullable

I've got a SQL Database Table, which has 35 existing records. One of the fields in this table is called Name, nvarchar(100), not null

However, due to a recent change, I need to make this column nullable.

When I change the column to allow nulls in SQL Server Management Studio, and go to save my changes, I get the following error:

Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created

How can I allow this to automatically be dropped and re-created?

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I've found the solution. Go to "Tools > Options > Designers > Table and Database Designers":

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