server/AyaNova/models/PurchaseOrder.cs

@@ -15,7 +15,7 @@ namespace AyaNova.Models
         public long Id { get; set; }
         public uint Concurrency { get; set; }
 
-        [Required]
+       
         public long Serial { get; set; }//WAS PO NUMBER        
         public string Notes { get; set; }
         public string Wiki { get; set; }