I hope someone guides me on how to fix this ValueError.

Can't save My Time off Request here's the error:

RPC_ERROR

Odoo Server Error

Traceback (most recent call last):

File "/opt/odoo16/odoo/api.py", line 984, in get

cache_value = field_cache[record._ids[0]]

KeyError: 30

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File "/opt/odoo16/odoo/fields.py", line 1160, in __get__

value = env.cache.get(record, self)

File "/opt/odoo16/odoo/api.py", line 991, in get

raise CacheMiss(record, field)

odoo.exceptions.CacheMiss: 'hr.employee(30,).department_id'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File "/opt/odoo16/odoo/http.py", line 1584, in _serve_db

return service_model.retrying(self._serve_ir_http, self.env)

File "/opt/odoo16/odoo/service/model.py", line 133, in retrying

result = func()

File "/opt/odoo16/odoo/http.py", line 1611, in _serve_ir_http

response = self.dispatcher.dispatch(rule.endpoint, args)

File "/opt/odoo16/odoo/http.py", line 1815, in dispatch

result = self.request.registry['ir.http']._dispatch(endpoint)

File "/opt/odoo16/addons/website/models/ir_http.py", line 235, in _dispatch

response = super()._dispatch(endpoint)

File "/opt/odoo16/odoo/addons/base/models/ir_http.py", line 154, in _dispatch

result = endpoint(**request.params)

File "/opt/odoo16/odoo/http.py", line 697, in route_wrapper

result = endpoint(self, *args, **params_ok)

File "/opt/odoo16/addons/web/controllers/dataset.py", line 42, in call_kw

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

File "/opt/odoo16/addons/web/controllers/dataset.py", line 33, in _call_kw

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

File "/opt/odoo16/odoo/api.py", line 459, in call_kw

result = _call_kw_model_create(method, model, args, kwargs)

File "/opt/odoo16/odoo/api.py", line 439, in _call_kw_model_create

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

File "", line 2, in create

File "/opt/odoo16/odoo/api.py", line 409, in _model_create_multi

return create(self, [arg])

File "/opt/odoo16/addons/hr_holidays_attendance/models/hr_leave.py", line 26, in create

res = super().create(vals_list)

File "", line 2, in create

File "/opt/odoo16/odoo/api.py", line 410, in _model_create_multi

return create(self, arg)

File "/opt/odoo16/addons/hr_holidays/models/hr_leave.py", line 945, in create

values.update({'department_id': employees.filtered(lambda emp: emp.id == employee_id).department_id.id})

File "/opt/odoo16/odoo/fields.py", line 2795, in __get__

return super().__get__(records, owner)

File "/opt/odoo16/odoo/fields.py", line 1186, in __get__

recs._fetch_field(self)

File "/opt/odoo16/odoo/models.py", line 3172, in _fetch_field

self._read(fnames)

File "/opt/odoo16/addons/hr/models/hr_employee.py", line 194, in _read

public.read(fields)

File "/opt/odoo16/odoo/models.py", line 2968, in read

raise ValueError("Invalid field %r on model %r" % (name, self._name))

ValueError: Invalid field 'certificates' on model 'hr.employee.public'

The above server error caused the following client error:

null