I try to install a new module but i got this Traceback

Odoo Server Error

Traceback (most recent call last):

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\http.py", line 537, in _handle_exception

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\http.py", line 574, in dispatch

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\http.py", line 310, in _call_function

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\service\model.py", line 113, in wrapper

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\http.py", line 307, in checked_call

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\http.py", line 803, in __call__

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\http.py", line 403, in response_wrap

File "C:\Program Files\Odoo 8.0-20150716\server\openerp\addons\web\controllers\main.py", line 948, in call_button

File "C:\Program Files\Odoo 8.0-20150716\server\openerp\addons\web\controllers\main.py", line 936, in _call_kw

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\api.py", line 241, in wrapper

File "C:\Program Files\Odoo 8.0-20150716\server\openerp\addons\base\module\module.py", line 446, in button_immediate_install

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\api.py", line 241, in wrapper

File "C:\Program Files\Odoo 8.0-20150716\server\openerp\addons\base\module\module.py", line 494, in _button_immediate_function

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\modules\registry.py", line 370, in new

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\modules\loading.py", line 355, in load_modules

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\modules\loading.py", line 255, in load_marked_modules

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\modules\loading.py", line 156, in load_module_graph

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\modules\registry.py", line 197, in setup_models

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\api.py", line 241, in wrapper

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\api.py", line 336, in old_api

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\models.py", line 3025, in _setup_complete

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\fields.py", line 593, in setup_triggers

File "C:\Program Files\Odoo 8.0-20150716\server\.\openerp\fields.py", line 607, in _setup_dependency

KeyError: 'employee_id'

anyone can help me to fixe it please !?