Skip posted moved/invoices in post

issue4283
review13661002

invoice.py

@@ -1334,10 +1334,10 @@ class Invoice(Workflow, ModelSQL, ModelView):
         for invoice in invoices:
             invoice.set_number()
             moves.append(invoice.create_move())
-        cls.write(invoices, {
+        cls.write([i for i in invoices if i.state != 'posted'], {
                 'state': 'posted',
                 })
-        Move.post(moves)
+        Move.post([m for m in moves if m.state != 'posted'])
         for invoice in invoices:
             if invoice.type in ('out_invoice', 'out_credit_note'):
                 invoice.print_invoice()