Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 642, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 684, in dispatch
    result = self._call_function(**self.params)
  File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 334, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/odoo/service/model.py", line 101, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 327, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 942, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 507, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python2.7/dist-packages/odoo/addons/web/controllers/main.py", line 899, in call_button
    action = self._call_kw(model, method, args, {})
  File "/usr/lib/python2.7/dist-packages/odoo/addons/web/controllers/main.py", line 887, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/usr/lib/python2.7/dist-packages/odoo/api.py", line 689, in call_kw
    return call_kw_multi(method, model, args, kwargs)
  File "/usr/lib/python2.7/dist-packages/odoo/api.py", line 680, in call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/odoo/addons/base/module/module.py", line 529, in button_immediate_upgrade
    return self._button_immediate_function(type(self).button_upgrade)
  File "/usr/lib/python2.7/dist-packages/odoo/addons/base/module/module.py", line 486, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/usr/lib/python2.7/dist-packages/odoo/modules/registry.py", line 83, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/usr/lib/python2.7/dist-packages/odoo/modules/loading.py", line 373, in load_modules
    force, status, report, loaded_modules, update_module, models_to_check)
  File "/usr/lib/python2.7/dist-packages/odoo/modules/loading.py", line 270, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/usr/lib/python2.7/dist-packages/odoo/modules/loading.py", line 182, in load_module_graph
    _load_data(cr, module_name, idref, mode, kind='data')
  File "/usr/lib/python2.7/dist-packages/odoo/modules/loading.py", line 96, in _load_data
    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
  File "/usr/lib/python2.7/dist-packages/odoo/tools/convert.py", line 845, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/usr/lib/python2.7/dist-packages/odoo/tools/convert.py", line 902, in convert_xml_import
    relaxng.assert_(doc)
  File "lxml.etree.pyx", line 3373, in lxml.etree._Validator.assert_ (src/lxml/lxml.etree.c:166758)
AssertionError: Element odoo has extra content: template, line 5

What does this mean, anyone?