why this please

[perlasaber]

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 99, in lookup
r = d[key]
File "", line 2, in getitem
File "/usr/lib/python3/dist-packages/odoo/tools/func.py", line 87, in locked
return func(inst, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/tools/lru.py", line 34, in getitem
a = self.d[obj]
KeyError: ('ir.model.data', <function IrModelData._xmlid_lookup at 0x7f900104e950>, 'fleet_rental.fleet_service_product')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/http.py", line 1781, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 133, in retrying
result = func()
File "/usr/lib/python3/dist-packages/odoo/http.py", line 1808, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 2012, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
result = endpoint(**request.params)
File "/usr/lib/python3/dist-packages/odoo/http.py", line 757, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 28, in call_button
action = self._call_kw(model, method, args, kwargs)
File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 20, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/usr/lib/python3/dist-packages/odoo/api.py", line 468, in call_kw
result = _call_kw_multi(method, model, args, kwargs)
File "/usr/lib/python3/dist-packages/odoo/api.py", line 453, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "", line 2, in button_immediate_install
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 75, in check_and_log
return method(self, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 466, in button_immediate_install
return self._button_immediate_function(self.env.registry[self._name].button_install)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_module.py", line 590, in _button_immediate_function
registry = modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "", line 2, in new
File "/usr/lib/python3/dist-packages/odoo/tools/func.py", line 87, in locked
return func(inst, *args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 114, in new
odoo.modules.load_modules(registry, force_demo, status, update_module)
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 480, in load_modules
processed_modules += load_marked_modules(env, graph,
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 364, in load_marked_modules
loaded, processed = load_module_graph(
File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 205, in load_module_graph
registry.init_models(env.cr, model_names, {'module': package.name}, new_install)
File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 573, in init_models
model._auto_init()
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3155, in _auto_init
new = field.update_db(self, columns)
File "/usr/lib/python3/dist-packages/odoo/fields.py", line 3032, in update_db
return super(Many2one, self).update_db(model, columns)
File "/usr/lib/python3/dist-packages/odoo/fields.py", line 1006, in update_db
self.update_db_notnull(model, column)
File "/usr/lib/python3/dist-packages/odoo/fields.py", line 1058, in update_db_notnull
model._init_column(self.name)
File "/usr/lib/python3/dist-packages/odoo/models.py", line 3071, in _init_column
value = field.default(self)
File "/mnt/extra-addons/fleet_rental-master/models/res_config_settings.py", line 33, in _get_default_product
return self.env.ref('fleet_rental.fleet_service_product').id
File "/usr/lib/python3/dist-packages/odoo/api.py", line 580, in ref
res_model, res_id = self['ir.model.data']._xmlid_to_res_model_res_id(
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_model.py", line 2187, in _xmlid_to_res_model_res_id
return self._xmlid_lookup(xmlid)
File "", line 2, in _xmlid_lookup
File "/usr/lib/python3/dist-packages/odoo/tools/cache.py", line 104, in lookup
value = d[key] = self.method(*args, **kwargs)
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_model.py", line 2180, in _xmlid_lookup
raise ValueError('External ID not found in the system: %s' % xmlid)
ValueError: External ID not found in the system: fleet_rental.fleet_service_product

The above server error caused the following client error:
RPC_ERROR: Odoo Server Error
RPC_ERROR
at makeErrorFromResponse (/web/assets/f258fae/web.assets_web.min.js:2891:163)
at XMLHttpRequest. (/web/assets/f258fae/web.assets_web.min.js:2895:13)