How to install MRP application? [ERROR regarding resource.timesheet_group1]

Installation of the MRP application fails with the following message (openerp 7, windows x64). Other modules such as timesheets, warehouse, employee management) complete successfully without any hipccups.

OpenERP Server Error

Client Traceback (most recent call last):
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\http.py", line 195, in dispatch
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\controllers\main.py", line 1083, in call_button
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\controllers\main.py", line 1071, in _call_kw
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\session.py", line 43, in proxy
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\session.py", line 31, in proxy_method
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\session.py", line 104, in send


Server Traceback (most recent call last):
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\web\session.py", line 90, in send
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\netsvc.py", line 295, in dispatch_rpc
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\service\web_services.py", line 614, in dispatch
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\osv\osv.py", line 169, in execute_kw
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\osv\osv.py", line 123, in wrapper
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\osv\osv.py", line 179, in execute
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\osv\osv.py", line 166, in execute_cr
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\base\module\module.py", line 715, in install_from_urls
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\base\module\module.py", line 425, in button_immediate_install
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\base\module\module.py", line 476, in _button_immediate_function
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\pooler.py", line 39, in restart_pool
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\modules\registry.py", line 214, in new
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\modules\loading.py", line 347, in load_modules
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\modules\loading.py", line 258, in load_marked_modules
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\modules\loading.py", line 194, in load_module_graph
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\modules\loading.py", line 76, in 
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\modules\loading.py", line 126, in _load_data
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\convert.py", line 954, in convert_xml_import
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\convert.py", line 847, in parse
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\convert.py", line 805, in _tag_record
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\convert.py", line 824, in id_get
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\convert.py", line 833, in model_id_get
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\cache.py", line 18, in lookup
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\cache.py", line 46, in lookup
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\base\ir\ir_model.py", line 861, in get_object_reference
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\cache.py", line 18, in lookup
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\.\openerp\tools\cache.py", line 46, in lookup
  File "C:\Program Files (x86)\OpenERP 7.0-20130211-002141\Server\server\openerp\addons\base\ir\ir_model.py", line 854, in _get_id
ValueError: No such external ID currently defined in the system: resource.timesheet_group1