diff --git a/models/fumoc_lot_prefix_dlc.py b/models/fumoc_lot_prefix_dlc.py
index 49413c0c80fa5f147e23da760ebff29cdcfa1fb8..2e28a3b6aeac97bce6fd006d9db6ce23603217b4 100644
--- a/models/fumoc_lot_prefix_dlc.py
+++ b/models/fumoc_lot_prefix_dlc.py
@@ -4,10 +4,15 @@
 from odoo import fields, models
 
 
-class ModelName(models.Model):
+class FumocLotPrefixDLC(models.Model):
     _name = 'fumoc.lot.prefix.dlc'
     _description = 'Correspondance préfix des lots et DLC'
 
     name = fields.Char('Descrition')
     prefix = fields.Char('Préfixe', required=True)
     dlc = fields.Integer('DLC')
+
+    _sql_constraints = [
+        ('unique_prefix', 'unique(prefix)',
+         'Le préfixe doit être unique')
+    ]