[FIX] connector_opencart: in 16, this is a stored computed field, which is not computed correctly initially

connector_opencart/models/sale_order/common.py

@@ -30,6 +30,13 @@ class OpencartSaleOrder(models.Model):
         digits=dp.get_precision('Account')
     )
 
+    @api.model
+    def create(self, values):
+        res = super().create(values)
+        # this is unfortunate, but the initial fiscal position gets set incorrectly
+        res.odoo_id._compute_fiscal_position_id()
+        return res
+
     @api.model
     def import_batch(self, backend, filters=None):
         """ Prepare the import of Sales Orders from Opencart """