Traceback (most recent call last):
  File "/opt/odoo/odoo-server/odoo/http.py", line 640, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/odoo-server/odoo/http.py", line 677, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo/odoo-server/odoo/http.py", line 333, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo/odoo-server/odoo/service/model.py", line 101, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo/odoo-server/odoo/http.py", line 326, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo/odoo-server/odoo/http.py", line 935, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo/odoo-server/odoo/http.py", line 506, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo/odoo-server/addons/web/controllers/main.py", line 889, in call_button
    action = self._call_kw(model, method, args, {})
  File "/opt/odoo/odoo-server/addons/web/controllers/main.py", line 877, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/odoo/odoo-server/odoo/api.py", line 681, in call_kw
    return call_kw_multi(method, model, args, kwargs)
  File "/opt/odoo/odoo-server/odoo/api.py", line 672, in call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/opt/odoo/odoo-server/odoo/addons/base/module/wizard/base_module_upgrade.py", line 76, in upgrade_module
    odoo.modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/opt/odoo/odoo-server/odoo/modules/registry.py", line 85, in new
    del cls.registries[db_name]
  File "/opt/odoo/odoo-server/odoo/tools/func.py", line 68, in wrapper
    return func(self, *args, **kwargs)
  File "/opt/odoo/odoo-server/odoo/tools/lru.py", line 72, in __delitem__
    nobj = self.d[obj]
KeyError: u'gelo'


This is from the odoo-server.log:
2018-03-19 06:55:40,508 28871 ERROR dev werkzeug: Error on request:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 180, in run_wsgi
    execute(self.server.app)
  File "/usr/lib/python2.7/dist-packages/werkzeug/serving.py", line 168, in execute
    application_iter = app(environ, start_response)
  File "/opt/odoo/odoo-server/odoo/service/server.py", line 250, in app
    return self.app(e, s)
  File "/opt/odoo/odoo-server/odoo/service/wsgi_server.py", line 184, in application
    return application_unproxied(environ, start_response)
  File "/opt/odoo/odoo-server/odoo/service/wsgi_server.py", line 170, in application_unproxied
    result = handler(environ, start_response)
  File "/opt/odoo/odoo-server/odoo/http.py", line 1308, in __call__
    return self.dispatch(environ, start_response)
  File "/opt/odoo/odoo-server/odoo/http.py", line 1282, in __call__
    return self.app(environ, start_wrapped)
  File "/usr/lib/python2.7/dist-packages/werkzeug/wsgi.py", line 591, in __call__
    return self.app(environ, start_response)
  File "/opt/odoo/odoo-server/odoo/http.py", line 1463, in dispatch
    odoo.registry(db).check_signaling()
  File "/opt/odoo/odoo-server/odoo/__init__.py", line 52, in registry
    return modules.registry.Registry(database_name)
  File "/opt/odoo/odoo-server/odoo/modules/registry.py", line 59, in __new__
    return cls.new(db_name)
  File "/opt/odoo/odoo-server/odoo/modules/registry.py", line 82, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/opt/odoo/odoo-server/odoo/modules/loading.py", line 341, in load_modules
    registry.setup_models(cr)
  File "/opt/odoo/odoo-server/odoo/modules/registry.py", line 288, in setup_models
    model._setup_base(partial)
  File "/opt/odoo/odoo-server/odoo/models.py", line 2820, in _setup_base
    self._add_manual_fields(partial)
  File "/opt/odoo/odoo-server/odoo/models.py", line 654, in _add_manual_fields
    field = IrModelFields._instanciate(field_data, partial)
  File "/opt/odoo/enterprise/web_studio/models/ir_model.py", line 178, in _instanciate
    field = super(IrModelField, self)._instanciate(field_data, partial)
  File "/opt/odoo/odoo-server/odoo/addons/base/ir/ir_model.py", line 682, in _instanciate
    rel, col1, col2 = self._custom_many2many_names(field_data['model'], field_data['relation'])
  File "/opt/odoo/odoo-server/odoo/addons/base/ir/ir_model.py", line 385, in _custom_many2many_names
    rel2 = self.env[comodel_name]._table
  File "/opt/odoo/odoo-server/odoo/api.py", line 752, in __getitem__
    return self.registry[model_name]._browse((), self)
  File "/opt/odoo/odoo-server/odoo/modules/registry.py", line 174, in __getitem__
    return self.models[model_name]
KeyError: u'hr.requirements'