I want to extend the "hr.employee" model using inheritance. Field to be added in view_employee_tree record id in hr_views.xml using inheritance.

models.py:

class CustomEmployee(models.Model):
    _name = 'custom_employee'
    _inherit = 'hr.employee'
    x_joining_date = fields.Char(string='Joining Date')

custom_field.xml:
<record id="employee_custom_tree_view" model="ir.ui.view">
    <field name="name">hr.employee.tree.</field>
    <field name="model">hr.employee</field>
    <field name="inherit_id" ref="hr.view_employee_tree" />
    <field name="arch" type="xml">
        <xpath expr="//record[@id='view_employee_tree']/field[@name='arch']/tree/field[@name='work_phone']" position="after">
            <field name="x_joining_date" />
        </xpath>
    </field>
</record>

When Upgrading the module, it shows the following error:

Traceback (most recent call last):
  File "/opt/odoo/odoo/odoo/models.py", line 1037, in _validate_fields
    check(self)
  File "/opt/odoo/odoo/odoo/addons/base/ir/ir_ui_view.py", line 337, in _check_xml
    view_def = view.read_combined(['arch'])
  File "/opt/odoo/odoo/odoo/addons/base/ir/ir_ui_view.py", line 727, in read_combined
    arch = self.apply_view_inheritance(arch_tree, root.id, self.model)
  File "/opt/odoo/odoo/odoo/addons/base/ir/ir_ui_view.py", line 676, in apply_view_inheritance
    source = self.apply_inheritance_specs(source, specs_tree, view_id)
  File "/opt/odoo/odoo/odoo/addons/base/ir/ir_ui_view.py", line 654, in apply_inheritance_specs
    self.raise_view_error(_("Element '%s' cannot be located in parent view") % tag, inherit_id)
  File "/opt/odoo/odoo/odoo/addons/base/ir/ir_ui_view.py", line 516, in raise_view_error
    raise ValueError(message)
ValueError: Element '<xpath expr="//record[@id='view_employee_tree']/field[@name='arch']/tree/field[@name='work_phone']">' cannot be located in parent view

Error context:
View `hr.employee.tree.`
[view_id: 672, xml_id: n/a, model: hr.employee, parent_id: 306]

During handling of the above exception, another exception occurred:
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Help me to solve this issue.