The migration ‘20200806160941_InitialMigration’ has already been applied to the database. Revert it and try again. If the migration has been applied to other databases, consider reverting its changes using a new migration.

dotnet ef database update 0
dotnet ef migrations remove

Here is what the above code is Doing:
1. Create a new migration named InitialCreate.
2. Update the database to the latest migration.
3. Remove the last migration.

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