Who can helps me for this error, it produce when i click on account entry thx a lot. 
behold the error : 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 242, in _dispatch
    result = request.dispatch()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 702, in dispatch
    result = self._call_function(**self.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 368, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 357, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 925, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 546, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 1282, in search_read
    return self.do_search_read(model, fields, offset, limit, domain, sort)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 1301, in do_search_read
    return Model.web_search_read(domain, fields, offset=offset, limit=limit, order=sort)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/models/models.py", line 62, in web_search_read
    records = self.search_read(domain, fields, offset=offset, limit=limit, order=order)
  File "/usr/lib/python3/dist-packages/odoo/addons/account/models/account_move.py", line 4480, in search_read
    return super(AccountMoveLine, self.with_context(domain_cumulated_balance=to_tuple(domain or []), order_cumulated_balance=order)).search_read(domain, fields, offset, limit, order)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 5091, in search_read
    result = records.read(fields, **read_kwargs)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3232, in read
    raise ValueError("Invalid field %r on model %r" % (name, self._name))
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 658, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 301, in _handle_exception
    raise exception.with_traceback(None) from new_cause
ValueError: Invalid field 'contra_accounts' on model 'account.move.line'