Error "physical_quantity is not valid" al cambiar estado de pedido

[salserin]

He podido cambiar el estado de un pedido en "Pago aceptado" pero no me deja cambiar el estado en "Enviado" (el que genera la factura).

 Me pone este mensaje :

[PrestaShopException]

Property Stock->physical_quantity is not valid
at line 872 in file classes/ObjectModel.php

867. 
868. 			$message = $this->validateField($field, $this->$field);
869. 			if ($message !== true)
870. 			{
871. 				if ($die)
872. 					throw new PrestaShopException($message);
873. 				return $error_return ? $message : false;
874. 			}
875. 		}
876. 
877. 		return true;

    ObjectModelCore->validateFields - [line 278 - classes/ObjectModel.php]
    ObjectModelCore->getFields - [line 631 - classes/ObjectModel.php]
    ObjectModelCore->update - [line 101 - classes/stock/Stock.php] - [1 Arguments]
    StockCore->update - [line 287 - classes/stock/StockManager.php]
    StockManagerCore->removeProduct - [line 223 - classes/order/OrderHistory.php] - [9 Arguments]
    OrderHistoryCore->changeIdOrderState - [line 520 - controllers/admin/AdminOrdersController.php] - [3 Arguments]
    AdminOrdersControllerCore->postProcess - [line 171 - classes/controller/Controller.php]
    ControllerCore->run - [line 373 - classes/Dispatcher.php]
    DispatcherCore->dispatch - [line 54 - admin/index.php]

Prestashop 1.6.014

Ninguna tabla prstshp_stock_available duplicada.

Alguna ayudita por favor?