server/AyaNova/biz/PurchaseOrderBiz.cs

@@ -623,11 +623,18 @@ namespace AyaNova.Biz
                             await PartBiz.RemoveSerialsAsync(oldItem.PartId, oldItem.Serials, ct, UserId);
                             await PartBiz.AppendSerialsAsync(newItem.PartId, newItem.Serials, ct, UserId);
                         }
-
                         continue;//on to next
                     }
 
-                    //### BEFORE ADDING MORE CHECKS HERE MAKE SURE LOGIC WORKS WITH ABOVE ###
+                    //SERIALS CHANGED                    
+                    if (oldItem.Serials != newItem.Serials)
+                    {
+                        await PartBiz.RemoveSerialsAsync(oldItem.PartId, oldItem.Serials, ct, UserId);
+                        await PartBiz.AppendSerialsAsync(newItem.PartId, newItem.Serials, ct, UserId);
+                    }
+
+
+                    //### BEFORE ADDING MORE CHECKS HERE MAKE SURE LOGIC WORKS WITH ABOVE (and add continue statement) ###
 
                 }
             }//modified block