diff --git a/src/web-server/routes/settings-routes.ts b/src/web-server/routes/settings-routes.ts
index baaa73a9..dc4c5063 100644
--- a/src/web-server/routes/settings-routes.ts
+++ b/src/web-server/routes/settings-routes.ts
@@ -18,6 +18,7 @@ import {
   resetAuthToDefaults,
 } from '../../cliproxy';
 import { regenerateConfig } from '../../cliproxy/config-generator';
+import { deduplicateCcsHooks } from '../../utils/websearch/hook-utils';
 import type { Settings } from '../../types/config';
 
 const router = Router();
@@ -136,6 +137,10 @@ router.put('/:profile', (req: Request, res: Response): void => {
       return;
     }
 
+    // Deduplicate CCS hooks to prevent accumulation (fixes #450)
+    // This handles cases where duplicate hooks were added by previous versions
+    deduplicateCcsHooks(settings as Record<string, unknown>);
+
     const ccsDir = getCcsDir();
 
     // Check for missing required fields (warning, not blocking - runtime fills defaults)