I'm trying to see Products in the Purchase Module and I have this error:

Uncaught Error: Campo desconocido cost_method en el dominio ["&",["valuation","=","real_time"],["cost_method","in",["standard","average"]]]

http://190.117.229.113:7000/web/static/src/js/framework/data.js:1081
Traceback:
Error: Campo desconocido cost_method en el dominio ["&",["valuation","=","real_time"],["cost_method","in",["standard","average"]]]
    at Object.compute_domain (http://190.117.229.113:7000/web/static/src/js/framework/data.js:1081:19)
    at OdooClass.compute_domain (http://190.117.229.113:7000/web/static/src/js/views/form_view.js:1200:21)
    at OdooClass.process_modifiers (http://190.117.229.113:7000/web/static/src/js/views/form_common.js:456:46)
    at OdooClass.trigger (http://190.117.229.113:7000/web/static/src/js/framework/mixins.js:222:31)
    at OdooClass.trigger (http://190.117.229.113:7000/web/static/src/js/framework/mixins.js:272:42)
    at OdooClass.on_form_changed (http://190.117.229.113:7000/web/static/src/js/views/form_view.js:413:14)
    at Array.<anonymous> (http://190.117.229.113:7000/web/static/src/js/views/form_view.js:378:18)
    at Array.<anonymous> (http://190.117.229.113:7000/web/static/lib/jquery/jquery.js:3276:89)
    at fire (http://190.117.229.113:7000/web/static/lib/jquery/jquery.js:3119:58)
    at Object.add [as done] (http://190.117.229.113:7000/web/static/lib/jquery/jquery.js:3165:49)

Anyone know how to fix this ??