diff --git a/cor_custom/models/crm_lead.py b/cor_custom/models/crm_lead.py
index 8a6ed2d..de4d749 100755
--- a/cor_custom/models/crm_lead.py
+++ b/cor_custom/models/crm_lead.py
@@ -28,6 +28,7 @@ class Lead(models.Model):
     #set_readonly = fields.Boolean('Set Readonly', compute='_domain_check_user_group')
 
     _sql_constraints = [
+        ('lead_no_uniq', 'unique(lead_no)', "Lead ID already exists !"),
         ('phone_uniq', 'unique(phone)', "Phone No already exists !"),
         ('email_from_uniq', 'unique(email_from)', "Email ID already exists !"),
     ]