Reset reference property on paste to let the workflow set the right reference value.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@6317 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Invoice.py

@@ -87,3 +87,8 @@ class Invoice(AccountingTransaction):
       raise NotImplemented
       return self.Invoice_zGetTotalNetPrice()
 
+    def manage_afterClone(self, item):
+      # Reset reference on paste
+      if self.getReference != None:
+        self.setReference(None)
+      AccountingTransaction.manage_afterClone(self, item)