diff --git a/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts b/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts
index 14ab3086a8..8713709bbd 100644
--- a/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts
+++ b/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts
@@ -231,8 +231,8 @@ export const previewStore: StateCreator<
           if (passportValue.length > 0) {
             const existingValue = acc.data?.[key] ?? [];
 
-            const combined = existingValue
-              .concat(passportValue)
+            const combined = passportValue
+              .concat(existingValue)
               .reduce(
                 (acc: string[], curr: string, _i: number, arr: string[]) => {
                   if (!arr.some((x) => x !== curr && x.startsWith(curr))) {