diff --git a/contract/models/contract_line.py b/contract/models/contract_line.py
index 80a3592ad..5f3a496c1 100644
--- a/contract/models/contract_line.py
+++ b/contract/models/contract_line.py
@@ -112,6 +112,10 @@ class ContractLine(models.Model):
         default=True,
     )
 
+    def _compute_display_name(self):
+        for rec in self:
+            rec.display_name = "%s - %s" % (rec.date_start, rec.name)
+
     @api.depends(
         "last_date_invoiced", "date_start", "date_end", "contract_id.last_date_invoiced"
     )
diff --git a/product_contract/models/contract_line.py b/product_contract/models/contract_line.py
index 9615cbee4..3f81bc201 100644
--- a/product_contract/models/contract_line.py
+++ b/product_contract/models/contract_line.py
@@ -16,7 +16,6 @@ class ContractLine(models.Model):
         required=False,
         copy=False,
     )
-    display_name = fields.Char(compute="_compute_display_name_2")
 
     def _prepare_invoice_line(self, move_form):
         res = super(ContractLine, self)._prepare_invoice_line(move_form)
@@ -48,11 +47,3 @@ class ContractLine(models.Model):
                 rec.termination_notice_rule_type = (
                     rec.product_id.termination_notice_rule_type
                 )
-
-    @api.depends("name", "date_start")
-    def _compute_display_name_2(self):
-        # FIXME: _compute_display_name depends on rec_name (display_name)
-        #  and this trigger a WARNING : display_name depends on itself;
-        #  please fix its decorator
-        for rec in self:
-            rec.display_name = ("%s - %s") % (rec.date_start, rec.name)