.net – Migration for sequence does not work in ASP.NET CORE 2.1

I am using the following packages.







    


    


    


    // generate id
modelBuilder.HasSequence ("UNIQUEIdGenerator", schema: "public")
.StartsAt (2000000000)
.IncrementsBy (1);

modelBuilder.Entity()
.Property (d => d.MondoDeviceId)
.HasDefaultValueSql ("CONCAT (& # 39; PREFIX & # 39 ;, NEXTVAL (& # 39; " UNIQUEIdGenerator  "& # 39;))");

When I do the migration, I succeed without any errors, but when I open PGADMIN and navigate to the database and verify the sequence under the public scheme. It does not show me the sequence of a single generator.