ASP.NET Core multiple dbcontext cannot add migration

I have 2 DbContexts:

services.AddDbContext<ConfigDbContext>(options => options.UseSqlServer(Configuration["Data:ConfigSQLServer:ConnectionString"].ToString(), t => t.MigrationsAssembly("App.Web")));

services.AddDbContext<AppDbContext>(options => options.UseSqlServer(Configuration["Data:AppSQLServer:ConnectionString"].ToString(), t => t.MigrationsAssembly("App.Web")));

when I try to run

dotnet ef migrations add Initial -c AppDbContext

I get:

No DbContext named 'AppDbContext' was found

If I run:

dotnet ef dbcontext list

the result is:

FullNamespace.ConfigDbContext

It doesn't seam to find the second DbContext AppDbContext

ConfigDbCOntext:

public class ConfigDbContext : DbContext
{
    public ConfigDbContext()
    {

    }

    public ConfigDbContext(DbContextOptions<ConfigDbContext> options) : base(options)
    {

    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
    }
}

AppDbContext:

public class AppDbContext : IdentityDbContext<ApplicationUser, ApplicationRole, Guid>
{
    public AppDbContext()
    {

    }

    public ConfigDbContext(DbContextOptions<AppDbContext> options) : base(options)
    {

    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
    }
}