diff --git a/B3SubstituteKill/BL/Bills/StatPay/StatPayBL.cs b/B3SubstituteKill/BL/Bills/StatPay/StatPayBL.cs
index adb1f0f..38e616e 100644
--- a/B3SubstituteKill/BL/Bills/StatPay/StatPayBL.cs
+++ b/B3SubstituteKill/BL/Bills/StatPay/StatPayBL.cs
@@ -19,9 +19,12 @@ namespace BWP.B3SubstituteKill.BL
   {
     protected override void beforeSave(StatPay dmo)
     {
-      dmo.PriceBill_ID = null;
-      if (dmo.Date.HasValue && dmo.Supplier_ID.HasValue)
-        dmo.PriceBill_ID = SupplierRpc.GetPriceBillID(dmo.Supplier_ID.Value, dmo.Date.Value);
+      if (dmo.SourceBillID == null || dmo.PriceBill_ID == null)
+      {
+        dmo.PriceBill_ID = null;
+        if (dmo.Date.HasValue && dmo.Supplier_ID.HasValue)
+          dmo.PriceBill_ID = SupplierRpc.GetPriceBillID(dmo.Supplier_ID.Value, dmo.Date.Value);
+      }
       foreach (var d in dmo.CostDetails)
         d.Money = d.Price * d.Number;
       foreach (var d in dmo.CallbackPayDetails)