hi can't some one help me to resolve this error , i want to update department in hr module 
Traceback (most recent call last):
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\http.py", line 648, in _handle_exception
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\http.py", line 685, in dispatch
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\http.py", line 321, in _call_function
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\service\model.py", line 118, in wrapper
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\http.py", line 314, in checked_call
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\http.py", line 964, in __call__
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\http.py", line 514, in response_wrap
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\openerp\addons\web\controllers\main.py", line 888, in call_kw
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\openerp\addons\web\controllers\main.py", line 880, in _call_kw
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\api.py", line 250, in wrapper
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\openerp\addons\hr\hr.py", line 348, in write
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\api.py", line 250, in wrapper
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\api.py", line 381, in old_api
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\openerp\addons\auditlog\models\rule.py", line 291, in write_full
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\api.py", line 248, in wrapper
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\models.py", line 3238, in read
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\api.py", line 248, in wrapper
  File "C:\Program Files (x86)\Odoo 9.0-20170105\server\.\openerp\models.py", line 3432, in _read_from_database
KeyError: 75