I am trying Odoo 8 on my local computer. After creating Quotation > Sales Order, I want to generate the invoice, but when I click Create Invoice, it shows err :

Traceback (most recent call last):
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\http.py", line 536, in _handle_exception
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\http.py", line 573, in dispatch
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\http.py", line 309, in _call_function
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\service\model.py", line 113, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\http.py", line 306, in checked_call
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\http.py", line 802, in __call__
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\http.py", line 402, in response_wrap
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\openerp\addons\web\controllers\main.py", line 937, in call_kw
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\openerp\addons\web\controllers\main.py", line 929, in _call_kw
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\api.py", line 241, in wrapper
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\api.py", line 363, in old_api
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\models.py", line 5864, in onchange
  File "C:\Program Files (x86)\Odoo 8.0-20150527\server\.\openerp\models.py", line 5780, in _onchange_eval
AttributeError: 'stock.invoice.onshipping' object has no attribute 'onchange_journal_id'

Is this a bug or my misconfig ? Please help, thank you.