diff --git a/src/node/plugins/localSearchPlugin.ts b/src/node/plugins/localSearchPlugin.ts
index 332c3294a..b00552b87 100644
--- a/src/node/plugins/localSearchPlugin.ts
+++ b/src/node/plugins/localSearchPlugin.ts
@@ -134,6 +134,7 @@ export async function localSearchPlugin(
       if (!section || !(section.text || section.titles)) break
       const { anchor, text, titles } = section
       const id = anchor ? [fileId, anchor].join('#') : fileId
+      index.has(id) && index.discard(id)
       index.add({
         id,
         text,