delete canceled sales order intercompany

Hi

i would like delete a sales order intercompany but i have the message error

name of company (who have done the purchase order)

if previous versions exist, the current document cannot be deleted 

when i go on the intracompany purchase order ,  the message is :

The sales order cannot be deleted because it has been created through an intercompany order.

we have not done delevery/receive/invoice  , just confirmation order

thank you in advance for your help