diff --git a/rma_sale_mrp/models/rma.py b/rma_sale_mrp/models/rma.py
index 741af052..b83a8a93 100644
--- a/rma_sale_mrp/models/rma.py
+++ b/rma_sale_mrp/models/rma.py
@@ -65,3 +65,13 @@ class Rma(models.Model):
                 }
             )
         return res
+
+    def action_draft(self):
+        if self.filtered(lambda r: r.state == "cancelled" and r.phantom_bom_product):
+            raise UserError(
+                _(
+                    "To avoid kit quantities inconsistencies it is not possible to convert "
+                    "to draft a cancelled RMA. You should do a new one from the sales order."
+                )
+            )
+        return super().action_draft()