AX 2012 R3 CU8 ERROR 1002 in POS when add item to Transaction

Hi all,

When i Recall suspend transaction and add new item i have this error :

Error number : 1002 An Error occurred in the operation.

Log Event :

LSRetailPosis.POSProcesses.POSProcessThread: System.NullReferenceException: Object reference not set to an instance of an object.
   at LSRetailPosis.Transaction.RetailTransaction.AllowGeneralAggregation(SaleLineItem itemBeingAdded, SaleLineItem itemToAggregateTo)
   at LSRetailPosis.Transaction.RetailTransaction.GetLineToAggregateTo(SaleLineItem saleLineItem, AggregateItemsModes aggregateItems)
   at LSRetailPosis.Transaction.RetailTransaction.Merge(Int32 lineId, AggregateItemsModes aggregateItems)
   at LSRetailPosis.POSProcesses.ItemSale.Execute()
   at LSRetailPosis.POSProcesses.Operation.RunOperation()
   at LSRetailPosis.POSProcesses.Search.ProcessItemSearch(Object Data)
   at LSRetailPosis.POSProcesses.Search.Execute()
   at LSRetailPosis.POSProcesses.Operation.RunOperation()
   at LSRetailPosis.POSProcesses.POSProcessThread.ThreadProc().

LSRetailPosis.POSProcesses.ItemSale: System.NullReferenceException: Object reference not set to an instance of an object.
   at LSRetailPosis.Transaction.RetailTransaction.AllowGeneralAggregation(SaleLineItem itemBeingAdded, SaleLineItem itemToAggregateTo)
   at LSRetailPosis.Transaction.RetailTransaction.GetLineToAggregateTo(SaleLineItem saleLineItem, AggregateItemsModes aggregateItems)
   at LSRetailPosis.Transaction.RetailTransaction.Merge(Int32 lineId, AggregateItemsModes aggregateItems)
   at LSRetailPosis.POSProcesses.ItemSale.Execute().

Regards,