How to Resolve 'Object Already Exists in Database' Error When Using Update-Database in EF Core?

Update-Database Error: Object Already Exists in Database

Problem Description:

Attempting to use the Update-Database command in ASP.Net Core and Entity Framework Core results in an error stating that an object with the same name already exists in the database.

Error Details:

There is already an object named 'ClientsAndTestimonials' in the database. System.Data.SqlClient.SqlException: 

Solution:

To resolve this error, an alternative approach can be used:

1. Comment out the Up() method in the migration file for the affected model change.
2. Apply the migration using the Update-Database command.
3. This establishes a baseline snapshot of the current model state.
4. Remove the comment from the Up() method and add back the model changes.
5. Add a second migration for the new changes.

Note:

This approach is equivalent to using Add-migration "Reset" -IgnoreChanges in previous versions of EF Core, but it is not directly supported in EF Core. The newly created baseline migration will prevent subsequent migrations from including changes made to objects that existed prior to the baseline.

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