diff --git a/addons/crm/models/crm_lead.py b/addons/crm/models/crm_lead.py
index c2a2bb40759..546c52452dd 100644
--- a/addons/crm/models/crm_lead.py
+++ b/addons/crm/models/crm_lead.py
@@ -92,7 +92,7 @@ class Lead(models.Model):
     priority = fields.Selection(crm_stage.AVAILABLE_PRIORITIES, string='Priority', index=True, default=crm_stage.AVAILABLE_PRIORITIES[0][0])
     date_closed = fields.Datetime('Closed Date', readonly=True, copy=False)
 
-    stage_id = fields.Many2one('crm.stage', string='Stage', ondelete='restrict', tracking=True, index=True,
+    stage_id = fields.Many2one('crm.stage', string='Stage', ondelete='restrict', tracking=True, index=True, copy=False,
         domain="['|', ('team_id', '=', False), ('team_id', '=', team_id)]",
         group_expand='_read_group_stage_ids', default=lambda self: self._default_stage_id())
     user_id = fields.Many2one('res.users', string='Salesperson', index=True, tracking=True, default=lambda self: self.env.user)
@@ -105,7 +105,7 @@ class Lead(models.Model):
     date_conversion = fields.Datetime('Conversion Date', readonly=True)
 
     # Probability - Only used for type opportunity
-    probability = fields.Float('Probability', group_operator="avg")
+    probability = fields.Float('Probability', group_operator="avg", copy=False)
     automated_probability = fields.Float('Automated Probability', readonly=True)
     is_automated_probability = fields.Boolean('Is automated probability?', compute="_compute_is_automated_probability")
     phone_state = fields.Selection([