diff --git a/bemade_partner_email_domain/models/res_partner.py b/bemade_partner_email_domain/models/res_partner.py
index 5239c23..8c1860c 100644
--- a/bemade_partner_email_domain/models/res_partner.py
+++ b/bemade_partner_email_domain/models/res_partner.py
@@ -8,6 +8,8 @@ class Partner(models.Model):
     @api.onchange('email')
     def _check_parent_from_email_domain(self):
         for rec in self:
+            if rec.parent_id:
+                continue
             try:
                 # Split the email address on '@' and get the domain part
                 if rec.email: