Hello, I have a problem with my M2M fields. When we modify one, the other is modified with the new values of the first one.

crm_lead.py :

class Lead(models.Model):
    _inherit = 'crm.lead'
    business_provider = fields.Many2one(comodel_name='res.partner', string='Business provider', domain='["|",("est_consultant_externe","=",True),("user_ids","!=",False),("user_ids.share", "=",False)]')
    internal_consultant_ids = fields.Many2many(comodel_name='res.partner', string='Internal consultant', domain='[("user_ids","!=",False),("user_ids.share", "=",False)]')
    external_consultant_ids = fields.Many2many(comodel_name='res.partner', string='External consultant', domain='[("est_consultant_externe","=",True)]')

crm_lead_view_form.xml :

<odoo>
  <data>
    <!-- crm.lead inherit form view -->
    <record id="lgp_crm_lead_inherit_view_form" model="ir.ui.view">
      <field name="name">lgp.crm.lead.inherit.view.form</field>
      <field name="model">crm.lead</field>
      <field name="inherit_id" ref="crm.crm_case_form_view_oppor"/>
      <field name="arch" type="xml">
        <xpath expr="//field[@name='user_id']" position="after">
          <field name="apporteur_affaire"/>
          <field name="consultant_interne_ids" widget="many2many_tags"/>
          <field name="consultant_externe_ids" widget="many2many_tags"/>
        </xpath>
      </field>
    </record>
  </data>
</odoo>

How can I resolve this problem, please ?