diff --git a/editor.planx.uk/src/@planx/components/PlanningConstraints/model.ts b/editor.planx.uk/src/@planx/components/PlanningConstraints/model.ts
index 15bec4ad7b..921ad70ed1 100644
--- a/editor.planx.uk/src/@planx/components/PlanningConstraints/model.ts
+++ b/editor.planx.uk/src/@planx/components/PlanningConstraints/model.ts
@@ -5,7 +5,7 @@ export interface PlanningConstraints extends BaseNodeData {
   description: string;
   fn: string;
   disclaimer: string;
-  dataValues: string[];
+  dataValues?: string[];
 }
 
 export const parseContent = (