diff --git a/src/Utils/request/useMutation.ts b/src/Utils/request/useMutation.ts
deleted file mode 100644
index cff4919a6bd..00000000000
--- a/src/Utils/request/useMutation.ts
+++ /dev/null
@@ -1,50 +0,0 @@
-import React from "react";
-
-import request from "@/Utils/request/request";
-import {
-  MutationRoute,
-  RequestOptions,
-  RequestResult,
-} from "@/Utils/request/types";
-import { mergeRequestOptions } from "@/Utils/request/utils";
-
-/**
- * @deprecated use `useMutation` from `@tanstack/react-query` instead.
- */
-export default function useDeprecatedMutation<TData, TBody>(
-  route: MutationRoute<TData, TBody>,
-  options: RequestOptions<TData, TBody>,
-) {
-  const [response, setResponse] = React.useState<RequestResult<TData>>();
-  const [isProcessing, setIsProcessing] = React.useState(false);
-
-  const controllerRef = React.useRef<AbortController>();
-
-  const runQuery = React.useCallback(
-    async (overrides?: RequestOptions<TData, TBody>) => {
-      controllerRef.current?.abort();
-
-      const controller = new AbortController();
-      controllerRef.current = controller;
-
-      const resolvedOptions =
-        options && overrides
-          ? mergeRequestOptions(options, overrides)
-          : (overrides ?? options);
-
-      setIsProcessing(true);
-      const response = await request(route, {
-        ...resolvedOptions,
-        signal: controller.signal,
-      });
-      if (response.error?.name !== "AbortError") {
-        setResponse(response);
-        setIsProcessing(false);
-      }
-      return response;
-    },
-    [route, JSON.stringify(options)],
-  );
-
-  return { ...response, isProcessing, mutate: runQuery };
-}
diff --git a/src/components/Questionnaire/QuestionnaireForm.tsx b/src/components/Questionnaire/QuestionnaireForm.tsx
index fab86814679..e58617b281e 100644
--- a/src/components/Questionnaire/QuestionnaireForm.tsx
+++ b/src/components/Questionnaire/QuestionnaireForm.tsx
@@ -14,7 +14,6 @@ import Loading from "@/components/Common/Loading";
 
 import routes from "@/Utils/request/api";
 import mutate from "@/Utils/request/mutate";
-import { HTTPError } from "@/Utils/request/types";
 import useQuery from "@/Utils/request/useQuery";
 import {
   DetailedValidationError,
@@ -85,7 +84,7 @@ export function QuestionnaireForm({
       toast.success(t("questionnaire_submitted_successfully"));
       onSubmit?.();
     },
-    onError: (error: HTTPError) => {
+    onError: (error) => {
       const errorData = error.cause;
       if (errorData?.results) {
         handleSubmissionError(errorData.results as ValidationErrorResponse[]);