Violation of PRIMARY KEY constraint ‘PK_OrderForms’.

http://social.msdn.microsoft.com/Forums/en-US/commserver2007/thread/898b5886-cb62-44d6-b64b-de719faf5b84
Above we see a nice thread about the following problem:
Error occurs while “Error on basket.SaveAsOrder()”
Violation of PRIMARY KEY constraint ‘PK_OrderForms’. Cannot insert duplicate key in object ‘dbo.OrderForms’