Odoo Server Error

Traceback (most recent call last):
  File "/odoo/odoo/odoo/api.py", line 1049, in get
    value = self._data[key][field][record._ids[0]]
KeyError: 1537

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/odoo/odoo/odoo/fields.py", line 1065, in __get__
    value = record.env.cache.get(record, self)
  File "/odoo/odoo/odoo/api.py", line 1051, in get
    raise CacheMiss(record, field)
odoo.exceptions.CacheMiss: ('mrp.bom(1537,).is_allowed_to_modif_unit', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/odoo/odoo/odoo/models.py", line 4765, in ensure_one
    _id, = self._ids
ValueError: too many values to unpack (expected 1)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/odoo/odoo/odoo/http.py", line 656, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/odoo/odoo/odoo/http.py", line 314, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/odoo/odoo/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/odoo/odoo/odoo/http.py", line 698, in dispatch
    result = self._call_function(**self.params)
  File "/odoo/odoo/odoo/http.py", line 346, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/odoo/odoo/odoo/service/model.py", line 98, in wrapper
    return f(dbname, *args, **kwargs)
  File "/odoo/odoo/odoo/http.py", line 339, in checked_call
    result = self.endpoint(*a, **kw)
  File "/odoo/odoo/odoo/http.py", line 941, in __call__
    return self.method(*args, **kw)
  File "/odoo/odoo/odoo/http.py", line 519, in response_wrap
    response = f(*args, **kw)
  File "/odoo/odoo/addons/web/controllers/main.py", line 967, in call_button
    action = self._call_kw(model, method, args, {})
  File "/odoo/odoo/addons/web/controllers/main.py", line 955, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/odoo/odoo/odoo/api.py", line 759, in call_kw
    return _call_kw_multi(method, model, args, kwargs)
  File "/odoo/odoo/odoo/api.py", line 746, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/odoo/Enterprise/mrp_plm/models/mrp_eco.py", line 586, in action_new_revision
    'previous_bom_id': eco.bom_id.id,
  File "/odoo/odoo/odoo/models.py", line 4336, in copy
    new = self.with_context(lang=None).create(vals)
  File "", line 2, in create
  File "/odoo/odoo/odoo/api.py", line 440, in _model_create_single
    return create(self, arg)
  File "/odoo/dihanet-almadina/mrp_production_draft/models/mrp_production.py", line 954, in create
    res = super(MrpBom, self).create(values)
  File "", line 2, in create
  File "/odoo/odoo/odoo/api.py", line 461, in _model_create_multi
    return create(self, [arg])
  File "/odoo/odoo/addons/mail/models/mail_thread.py", line 298, in create
    thread.message_track(tracked_fields, initial_values)
  File "/odoo/odoo/addons/mail/models/mail_thread.py", line 640, in message_track
    tracking = self._message_track_get_changes(tracked_fields, initial_values)
  File "/odoo/odoo/addons/mail/models/mail_thread.py", line 601, in _message_track_get_changes
    result[record.id] = record._message_track(tracked_fields, initial_values[record.id])
  File "/odoo/odoo/addons/mail/models/mail_thread.py", line 618, in _message_track
    new_value = getattr(self, col_name)
  File "/odoo/odoo/odoo/fields.py", line 1069, in __get__
    self.determine_value(record)
  File "/odoo/odoo/odoo/fields.py", line 1182, in determine_value
    self.compute_value(recs)
  File "/odoo/odoo/odoo/fields.py", line 1136, in compute_value
    self._compute_value(records)
  File "/odoo/odoo/odoo/fields.py", line 1127, in _compute_value
    getattr(records, self.compute)()
  File "/odoo/dihanet-almadina/mrp_production_draft/models/mrp_production.py", line 945, in get_user
    self.is_allowed_to_modif_unit = True
  File "/odoo/odoo/odoo/fields.py", line 1084, in __set__
    record.ensure_one()
  File "/odoo/odoo/odoo/models.py", line 4768, in ensure_one
    raise ValueError("Expected singleton: %s" % self)
ValueError: Expected singleton: mrp.bom(1537, 25)