Hello,

When clicking on setting-->general settings, all of a sudden I get an error as follows. I am out of ideas where to look, why this is happening without me interfering to the model. Would appreciate your help. 

Error: 
Odoo Server Error



Traceback (most recent call last):

  File "/home/odoo/src/odoo/odoo/http.py", line 656, in _handle_exception

    return super(JsonRequest, self)._handle_exception(exception)

  File "/home/odoo/src/odoo/odoo/http.py", line 314, in _handle_exception

    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])

  File "/home/odoo/src/odoo/odoo/tools/pycompat.py", line 87, in reraise

    raise value

  File "/home/odoo/src/odoo/odoo/http.py", line 698, in dispatch

    result = self._call_function(**self.params)

  File "/home/odoo/src/odoo/odoo/http.py", line 346, in _call_function

    return checked_call(self.db, *args, **kwargs)

  File "/home/odoo/src/odoo/odoo/service/model.py", line 97, in wrapper

    return f(dbname, *args, **kwargs)

  File "/home/odoo/src/odoo/odoo/http.py", line 339, in checked_call

    result = self.endpoint(*a, **kw)

  File "/home/odoo/src/odoo/odoo/http.py", line 941, in __call__

    return self.method(*args, **kw)

  File "/home/odoo/src/odoo/odoo/http.py", line 519, in response_wrap

    response = f(*args, **kw)

  File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 962, in call_kw

    return self._call_kw(model, method, args, kwargs)

  File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 954, in _call_kw

    return call_kw(request.env[model], method, args, kwargs)

  File "/home/odoo/src/odoo/odoo/api.py", line 755, in call_kw

    return _call_kw_model(method, model, args, kwargs)

  File "/home/odoo/src/odoo/odoo/api.py", line 728, in _call_kw_model

    result = method(recs, *args, **kwargs)

  File "/home/odoo/src/odoo/odoo/models.py", line 1385, in load_views

    for [v_id, v_type] in views

  File "/home/odoo/src/odoo/odoo/models.py", line 1385, in <dictcomp>

    for [v_id, v_type] in views

  File "/home/odoo/src/odoo/odoo/addons/base/models/res_config.py", line 395, in fields_view_get

    toolbar=toolbar, submenu=submenu)

  File "/home/odoo/src/odoo/odoo/models.py", line 1471, in fields_view_get

    xarch, xfields = View.postprocess_and_fields(self._name, etree.fromstring(result['arch']), view_id)

  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_ui_view.py", line 1111, in postprocess_and_fields

    self.raise_view_error(message, view_id)

  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_ui_view.py", line 548, in raise_view_error

    raise ValueError(message)

ValueError: Field `invoice_is_snailmail` does not exist



Error context:

View `n/a`

[view_id: n/a, xml_id: n/a, model: n/a, parent_id: n/a]

Terje