diff --git a/web/src/pages/agent/form/title-chunker-form/index.tsx b/web/src/pages/agent/form/title-chunker-form/index.tsx
index 5cc8efcd23..1e56df20c3 100644
--- a/web/src/pages/agent/form/title-chunker-form/index.tsx
+++ b/web/src/pages/agent/form/title-chunker-form/index.tsx
@@ -71,6 +71,7 @@ export enum TitleChunkerRulesField {
 
 export type TitleChunkerFormSchemaType = z.infer<typeof FormSchema> & {
   rules: z.infer<typeof rulesSchema>;
+  hierarchy: string;
 };
 
 type LevelItemProps = {
diff --git a/web/src/pages/agent/utils.ts b/web/src/pages/agent/utils.ts
index 5ae01936e7..06832ae85f 100644
--- a/web/src/pages/agent/utils.ts
+++ b/web/src/pages/agent/utils.ts
@@ -364,9 +364,9 @@ function transformTitleChunkerParams(params: TitleChunkerFormSchemaType) {
   );
 
   const hierarchyValue =
-    params.method === TitleChunkerMethod.Group
+    (params.method === TitleChunkerMethod.Group
       ? params.hierarchyGroup
-      : params.hierarchyHierarchy;
+      : params.hierarchyHierarchy) ?? params.hierarchy;
 
   return {
     ...omit(params, [