diff --git a/app/constant.ts b/app/constant.ts
index 2a5ca0cb3..ff37e3428 100644
--- a/app/constant.ts
+++ b/app/constant.ts
@@ -127,12 +127,10 @@ export const KnowledgeCutOffDate: Record<string, string> = {
   default: "2021-09",
   "gpt-4-turbo": "2023-12",
   "gpt-4-turbo-2024-04-09": "2023-12",
-  "gpt-4-turbo": "2023-12",
   "gpt-4-turbo-preview": "2023-12",
   "gpt-4-1106-preview": "2023-04",
   "gpt-4-0125-preview": "2023-12",
   "gpt-4-vision-preview": "2023-04",
-  "gpt-4-turbo-2024-04-09": "2023-12",
   
   // After improvements,
   // it's now easier to add "KnowledgeCutOffDate" instead of stupid hardcoding it, as was done previously.