diff --git a/web/app/components/datasets/create/step-two/hooks/use-indexing-config.ts b/web/app/components/datasets/create/step-two/hooks/use-indexing-config.ts
index 74924de6dc..881a9fb043 100644
--- a/web/app/components/datasets/create/step-two/hooks/use-indexing-config.ts
+++ b/web/app/components/datasets/create/step-two/hooks/use-indexing-config.ts
@@ -1,7 +1,7 @@
 import type { DefaultModel } from '@/app/components/header/account-setting/model-provider-page/declarations'
 import type { SummaryIndexSetting as SummaryIndexSettingType } from '@/models/datasets'
 import type { RetrievalConfig } from '@/types/app'
-import { useEffect, useMemo, useState } from 'react'
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import { checkShowMultiModalTip } from '@/app/components/datasets/settings/utils'
 import { ModelTypeEnum } from '@/app/components/header/account-setting/model-provider-page/declarations'
 import { useDefaultModel, useModelList, useModelListAndDefaultModelAndCurrentProviderAndModel } from '@/app/components/header/account-setting/model-provider-page/hooks'
@@ -122,6 +122,12 @@ export const useIndexingConfig = (options: UseIndexingConfigOptions) => {
   const [summaryIndexSetting, setSummaryIndexSetting] = useState<SummaryIndexSettingType | undefined>(
     initialSummaryIndexSetting ?? undefined,
   )
+  const summaryIndexSettingRef = useRef<SummaryIndexSettingType | undefined>(initialSummaryIndexSetting ?? undefined)
+
+  const handleSummaryIndexSettingChange = useCallback((payload: SummaryIndexSettingType) => {
+    setSummaryIndexSetting({ ...summaryIndexSettingRef.current, ...payload })
+    summaryIndexSettingRef.current = { ...summaryIndexSettingRef.current, ...payload }
+  }, [])
 
   return {
     // Index type
@@ -148,7 +154,7 @@ export const useIndexingConfig = (options: UseIndexingConfigOptions) => {
 
     // Summary index setting
     summaryIndexSetting,
-    setSummaryIndexSetting,
+    handleSummaryIndexSettingChange,
   }
 }
 
diff --git a/web/app/components/datasets/create/step-two/index.tsx b/web/app/components/datasets/create/step-two/index.tsx
index 8302c1afbe..4dfccb9381 100644
--- a/web/app/components/datasets/create/step-two/index.tsx
+++ b/web/app/components/datasets/create/step-two/index.tsx
@@ -219,7 +219,7 @@ const StepTwo: FC<StepTwoProps> = ({
             onReset={segmentation.resetToDefaults}
             locale={locale}
             summaryIndexSetting={indexing.summaryIndexSetting}
-            onSummaryIndexSettingChange={indexing.setSummaryIndexSetting}
+            onSummaryIndexSettingChange={indexing.handleSummaryIndexSettingChange}
           />
         )}
         {showParentChildOption && (
@@ -240,7 +240,7 @@ const StepTwo: FC<StepTwoProps> = ({
             onPreview={updatePreview}
             onReset={segmentation.resetToDefaults}
             summaryIndexSetting={indexing.summaryIndexSetting}
-            onSummaryIndexSettingChange={indexing.setSummaryIndexSetting}
+            onSummaryIndexSettingChange={indexing.handleSummaryIndexSettingChange}
           />
         )}
         <Divider className="my-5" />