EF migration with new table collation error

I'm using Entity Framework code first, It has been working ok updating the database with db migrations up until recently...

I've added a anew property to the AspNetUser table

public partial class AspNetUser
{
....
 public ICollection<Feed> Feeds { get; set; }
}

This is my new table

public class Feed
    {
        public int Id { get; set; }

        public string UserId { get; set; }
        public AspNetUser User { get; set; }

        public MessageType Type { get; set; }
        public string Data { get; set; }

        public DateTime DateCreated { get; set; }

    }

And this the is DBMigration script generated

 public override void Up()
            {
                CreateTable(
                    "dbo.Feeds",
                    c => new
                        {
                            Id = c.Int(nullable: false, identity: true),
                            UserId = c.String(nullable: false, maxLength: 128),
                            Type = c.Int(nullable: false),
                            Data = c.String(),
                            DateCreated = c.DateTime(nullable: false),
                        })
                    .PrimaryKey(t => t.Id)
                    .ForeignKey("dbo.AspNetUsers", t => t.UserId, cascadeDelete: true)
                    .Index(t => t.UserId);

            }

In the Context class:

 modelBuilder.Entity<Feed>().HasRequired(x => x.User).WithMany(x => x.Feeds).HasForeignKey(x => x.UserId);

This created the table fine, on localhost, but when i deployed and run the migration on staging, the error i get is:

Column 'dbo.AspNetUsers.Id' is not of same collation as referencing column 'Feeds.UserId' in foreign key 'FK_dbo.Feeds_dbo.AspNetUsers_UserId'. Could not create constraint or index. See previous errors.

What must I do... I've gone with the code first approach, thinking this would be easier, but this is really frustrating.

Note: I'm using sql Azure