diff --git a/application/models/purchaseorder_model.php b/application/models/purchaseorder_model.php
index 93783349..95543c8c 100755
--- a/application/models/purchaseorder_model.php
+++ b/application/models/purchaseorder_model.php
@@ -565,8 +565,8 @@ function GetPOType($ReqNo)
 			// print_r($this->db->last_query());		
 			if($insert_id>0)
 			{
-				$subQuery = 'select max(PONO) as PONO from T_PurchaseOrder_Master where POType=? and POSubType=?';   
-          
+				//$subQuery = 'select max(PONO) as PONO from T_PurchaseOrder_Master where POType=? and POSubType=?';   
+          $subQuery = 'select PONO from T_PurchaseOrder_Master where POType=? and POSubType=? order by CreatedDate desc limit 1';   
 				$query = $this->db->query($subQuery,array($POType,$POSubtype));
         
 				return $query->result_array();