diff --git a/contract/__manifest__.py b/contract/__manifest__.py
index 60a41bd35..5f529f00b 100644
--- a/contract/__manifest__.py
+++ b/contract/__manifest__.py
@@ -9,7 +9,7 @@
 
 {
     'name': 'Recurring - Contracts Management',
-    'version': '12.0.6.0.2',
+    'version': '12.0.6.0.3',
     'category': 'Contract Management',
     'license': 'AGPL-3',
     'author': "OpenERP SA, "
diff --git a/contract/wizards/contract_line_wizard.py b/contract/wizards/contract_line_wizard.py
index f136d36d1..a9fe6cd80 100644
--- a/contract/wizards/contract_line_wizard.py
+++ b/contract/wizards/contract_line_wizard.py
@@ -25,6 +25,7 @@ class ContractLineWizard(models.TransientModel):
         string="Contract Line",
         required=True,
         index=True,
+        ondelete="cascade",
     )
 
     @api.multi