I'm getting this error while updating the db

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder.UseSqlServer(
@"Server=AHMET;Database=test;Trusted_Connection=True");
}
public DbSet Products { get; set; }
public DbSet ProductFavorites{ get; set; }
public DbSet ProductImages { get; set; }
public DbSet Categories { get; set; }
public DbSet SubCategories { get; set; }
public DbSet Members { get; set; }
public DbSet Users { get; set; }
public DbSet Blogs { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
}
public class Category
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid CategoryId { get; set; }
[Required]
[DisplayName("Category")]
public string Name { get; set; }
public virtual IList SubCategory { get; set; }
}
public class SubCategory
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid SubCategoryId { get; set; }
[Required]
[DisplayName("Subcategory")]
public string Name { get; set; }
[DisplayName("Category")]
public Guid CategoryId { get; set; }
[ForeignKey("CategoryId")]
public virtual Category Category { get; set; }
public virtual IList Products { get; set; }
}

I give migrations the update-database command, I get the following error:

Error Number:1767,State:0,Class:16 "Foreign key 'FK_Products_Categories_CategoryId' references invalid table 'Categories'. Could not create constraint. See previous errors."

Thanks in advance for your interest.