diff --git a/wax-questions-service/src/NumericalAnswerService/schema/NumericalAnswerContainerNode.js b/wax-questions-service/src/NumericalAnswerService/schema/NumericalAnswerContainerNode.js
index 0ba378786575e6a9cb566504b8f02db237cafd8a..e85e3d027078ff13fb26872a251433f0c4663b7b 100644
--- a/wax-questions-service/src/NumericalAnswerService/schema/NumericalAnswerContainerNode.js
+++ b/wax-questions-service/src/NumericalAnswerService/schema/NumericalAnswerContainerNode.js
@@ -48,6 +48,7 @@ const NumericalAnswerContainerNode = {
         class: node.attrs.class,
         feedback: node.attrs.feedback,
       },
+      0,
     ];
   },
 };