SQL Server - How to fix error in SQL Server Saving changes is not permitted Identity Specification

In this video I show how to fix the following error in SQL Server
Error - Saving changes is not permitted.

I use SQL Server Express 2017 and Visual Studio Community Edition 2017 .

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This Example shows that how to fix the following error in SQL Server
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 recreated or enabled the option Prevent saving changes that require the table to be re-created.

To change the Prevent saving changes that require the table re-creation option, follow these steps:

1) Open SQL Server Management Studio (SSMS).

2) On the Tools menu, click Options.

3)In the navigation pane of the Options window, click Designers.

4) Select or clear the Prevent saving changes that require the table re-creation check box, and then click OK.