diff --git a/src/components/forms/custom-form-builder.tsx b/src/components/forms/custom-form-builder.tsx
index d9c9db9..2f587e8 100644
--- a/src/components/forms/custom-form-builder.tsx
+++ b/src/components/forms/custom-form-builder.tsx
@@ -1069,6 +1069,23 @@ export function CustomFormBuilder() {
           </DialogFooter>
         </DialogContent>
       </Dialog>
+
+      <FormFieldDefsDialog
+        open={fieldsDialogOpen}
+        onOpenChange={setFieldsDialogOpen}
+        fields={formFields}
+        onChange={(next) => {
+          setFormFields(next);
+          // prune values whose keys no longer exist; seed defaults for new keys
+          setFieldValues((prev) => {
+            const out: Record<string, string> = {};
+            for (const f of next) {
+              out[f.key] = prev[f.key] ?? f.default ?? "";
+            }
+            return out;
+          });
+        }}
+      />
     </div>
   );
 }