EF Core Migration error: Database 'MyDatabaseName' already exists. Choose a different database name

I am running ASP.NET Core 2.1 with EF Core 2.1 application on Windows Server 2016 with SQL Server 2017 Web edition.

At the end of public void Configure(IApplicationBuilder app, ... method in Startup.cs I call context.Database.Migrate();. This applies migrations.
Everything works.

Now I backup database in my development environment in SQL Server 2016, move MyDatabaseName .bak file to server and restore database MyDatabaseName on server and restart IIS site.
When I start application (open browser) I get the following error:

Application startup exception: System.Data.SqlClient.SqlException (0x80131904): Database 'MyDatabaseName' already exists. Choose a different database name.

in line: context.Database.Migrate();. Full error is at the bottom.

If I change MyDatabaseName to MyDatabaseNameX (which doesn't exists) database is created, all migrations are applied, I can reset IIS, application is started. If I restore database I get error already exists.

Same application (exactly the same dll) runs application on development and production environment. That also means database structure is the same.

I need to restore database on production. I am just not sure why context.Database.Migrate() throws error?

Full error:

Application startup exception: System.Data.SqlClient.SqlException (0x80131904): Database 'MyDatabaseName' already exists. Choose a different database name. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource1 completion, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite, String methodName) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary2 parameterValues) at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary2 parameterValues) at Microsoft.EntityFrameworkCore.Migrations.MigrationCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary2 parameterValues) at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationCommandExecutor.ExecuteNonQuery(IEnumerable`1 migrationCommands, IRelationalConnection connection) at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerDatabaseCreator.Create() at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration) at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.Migrate(DatabaseFacade databaseFacade) at MyProject.Startup.Configure(IApplicationBuilder app, AppUserManager userManager, IServiceProvider serviceProvider) in C:\GitLab-Runner\builds\7cab42e4\0\web\MyProject\Startup.cs:line 582 --- End of stack trace from previous location where exception was thrown --- at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure(IApplicationBuilder app) at Microsoft.AspNetCore.Server.IISIntegration.IISSetupFilter.<>c__DisplayClass4_0.b__0(IApplicationBuilder app) at Microsoft.AspNetCore.Hosting.Internal.AutoRequestServicesStartupFilter.<>c__DisplayClass0_0.b__0(IApplicationBuilder builder) at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication() ClientConnectionId:7f6b84a3-e0ea-42c7-947d-a9cafdaffbfa Error Number:1801,State:3,Class:16 Hosting environment: Production Content root path: C:\WWW\MyProject Now listening on: http://127.0.0.1:24830 Application started. Press Ctrl+C to shut down. Application is shutting down...

This was a nasty one. Database really exists (I did restore it), but problem was that with backup owner of database was also transferred.
User that was owner on localhost do not exists on server. So migrations didn't find database (because it didn't have access to) so it tries to create a new one.