hello everyone

i am using "fleet moudle" , so i want to add a new field in Vehicle page,

this is my code:

fleet_view.xml
<group string="Additional Properties">
                                <field name="seats" />
                                <field name="doors" />
                                <field name="color" />
                <field name="year_manuf" />
 </group>

fleet.py

_name = 'fleet.vehicle'
    _description = 'Information on a vehicle'
    _order= 'license_plate asc'
    _columns = {
        'name': fields.function(_vehicle_name_get_fnc, type="char", string='Name', store=True),
        'company_id': fields.many2one('res.company', 'Company'),
        'license_plate': fields.char('License Plate', size=32, required=True, help='License plate number of the vehicle (ie: plate number for a car)'),
        'vin_sn': fields.char('Chassis Number', size=32, help='Unique number written on the vehicle motor (VIN/SN number)'),
        'driver_id': fields.many2one('res.partner', 'Driver', help='Driver of the vehicle'),
        'model_id': fields.many2one('fleet.vehicle.model', 'Model', required=True, help='Model of the vehicle'),
        'log_fuel': fields.one2many('fleet.vehicle.log.fuel', 'vehicle_id', 'Fuel Logs'),
        'log_services': fields.one2many('fleet.vehicle.log.services', 'vehicle_id', 'Services Logs'),
        'log_contracts': fields.one2many('fleet.vehicle.log.contract', 'vehicle_id', 'Contracts'),
        'acquisition_date': fields.date('Acquisition Date', required=False, help='Date when the vehicle has been bought'),
        'color': fields.char('Color', size=32, help='Color of the vehicle'),
        'state_id': fields.many2one('fleet.vehicle.state', 'State', help='Current state of the vehicle', ondelete="set null"),
        'location': fields.char('Location', size=128, help='Location of the vehicle (garage, ...)'),
        'seats': fields.integer('Seats Number', help='Number of seats of the vehicle'),
        'doors': fields.integer('Doors Number', help='Number of doors of the vehicle'),
        'year_manuf': fields.char('Year', size=32, help='manuf of the vehicle'),
        'tag_ids' :fields.many2many('fleet.vehicle.tag', 'fleet_vehicle_vehicle_tag_rel', 'vehicle_tag_id','tag_id', 'Tags'),
        'odometer': fields.function(_get_odometer, fnct_inv=_set_odometer, type='float', string='Last Odometer', help='Odometer measure of the vehicle at the moment of this log'),
        'odometer_unit': fields.selection([('kilometers', 'Kilometers'),('miles','Miles')], 'Odometer Unit', help='Unit of the odometer ',required=True),
        'transmission': fields.selection([('manual', 'Manual'), ('automatic', 'Automatic')], 'Transmission', help='Transmission Used by the vehicle'),
        'fuel_type': fields.selection([('gasoline', 'Gasoline'), ('diesel', 'Diesel'), ('electric', 'Electric'), ('hybrid', 'Hybrid')], 'Fuel Type', help='Fuel Used by the vehicle'),
        'horsepower': fields.integer('Horsepower'),
        'horsepower_tax': fields.float('Horsepower Taxation'),
        'power': fields.integer('Power (kW)', help='Power in kW of the vehicle'),
        'co2': fields.float('CO2 Emissions', help='CO2 emissions of the vehicle'),
        'image': fields.related('model_id', 'image', type="binary", string="Logo"),
        'image_medium': fields.related('model_id', 'image_medium', type="binary", string="Logo"),
        'image_small': fields.related('model_id', 'image_small', type="binary", string="Logo"),
        'contract_renewal_due_soon': fields.function(_get_contract_reminder_fnc, fnct_search=_search_contract_renewal_due_soon, type="boolean", string='Has Contracts to renew', multi='contract_info'),
        'contract_renewal_overdue': fields.function(_get_contract_reminder_fnc, fnct_search=_search_get_overdue_contract_reminder, type="boolean", string='Has Contracts Overdued', multi='contract_info'),
        'contract_renewal_name': fields.function(_get_contract_reminder_fnc, type="text", string='Name of contract to renew soon', multi='contract_info'),
        'contract_renewal_total': fields.function(_get_contract_reminder_fnc, type="integer", string='Total of contracts due or overdue minus one', multi='contract_info'),
        'car_value': fields.float('Car Value', help='Value of the bought vehicle'),
        }

    _defaults = {
        'doors': 5,
        'odometer_unit': 'kilometers',
        'state_id': _get_default_state,
    }

this is the error : Error occurred while validating the field(s) arch: Invalid XML for View Architecture!

the field is : year_manuf