I want to inherit the module crm.lead and i have an error at the module name level ,

"module non trouvé: crm.lead" , who can help me please.

this is the part of my code:

<record id="view_leads_tree" model="ir.ui.view">
            <field name="name">crm.lead.tree.inherit</field>
            <field name="model">crm.lead</field>
            <field eval="8" name="priority"/>
            <field name="inherit_id" ref="crm.crm_case_tree_view_leads"/>
            <field name="arch" type="xml">
                <tree string="leads">
                    <field name="state"/>
                    <field name="partner_id"/>
                    <field name="user_id"/>
                </tree>
            </field>
        </record>

       <record id="action_lead" model="ir.actions.act_window">
            <field name="name">leads list</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">crm.lead</field>
            <field name="view_type">tree</field> 
            <field name="view_mode">tree</field>        
            <field name="domain">[]</field>
            <field name="context">{}</field>
            <field name="help">Manage the contact titles you want to have available in your system and the way you want to print them in letters and other documents. Some example: Mr., Mrs.
            </field>
        </record>