Hello, at attemp to update the Web module i get the following error:

  File "/usr/lib/python2.7/dist-packages/openerp/fields.py", line 823, in __get__
    return record._cache[self]
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 5955, in __getitem__
    return value.get() if isinstance(value, SpecialValue) else value
  File "/usr/lib/python2.7/dist-packages/openerp/fields.py", line 55, in get
    raise self.exception
ParseError: "MissingError
One of the documents you are trying to access has been deleted, please try again after refreshing." while parsing /usr/lib/python2.7/dist-packages/openerp/addons/hr/hr_data.xml:5, near
<record model="mail.message" id="module_install_notification">
            <field name="model">mail.group</field>
            <field name="res_id" ref="mail.group_all_employees"/>
            <field name="type">notification</field>
            <field name="subtype_id" ref="mail.mt_comment"/>
            <field name="subject">Employee Directory application installed!</field>
            <field name="body">&lt;p&gt;Manage your human resources with Odoo: employees and their hierarchy, HR departments and job positions.&lt;/p&gt;
&lt;p&gt;More HR features are available via extra applications: Recruitment Process (manage job positions and recruitment), Timesheet Validation (record timesheets and attendance),
Leave Management (keep track of employee leaves), Expense Management (manage employee expenses), Employee Appraisals (organize employee surveys, where employees evaluate their subordinates or their manager).&lt;/p&gt;</field>
        </record>  

the same goes for the human resources module. Any idea?

 Thanks.