diff --git a/front/lib/api/data_sources.ts b/front/lib/api/data_sources.ts
index 2882cea2117a..787b42e3cc4f 100644
--- a/front/lib/api/data_sources.ts
+++ b/front/lib/api/data_sources.ts
@@ -458,6 +458,10 @@ export async function upsertTable({
       return csvRowsRes;
     }
 
+    const detectedHeaders = csvRowsRes?.isOk()
+      ? csvRowsRes.value.detectedHeaders
+      : undefined;
+
     const enqueueRes = await enqueueUpsertTable({
       upsertTable: {
         workspaceId: auth.getNonNullableWorkspace().sId,
@@ -471,6 +475,7 @@ export async function upsertTable({
         csv: csv ?? null,
         truncate,
         useAppForHeaderDetection: useApp,
+        detectedHeaders,
       },
     });
     if (enqueueRes.isErr()) {
@@ -621,6 +626,10 @@ export async function handleDataSourceTableCSVUpsert({
       });
     }
 
+    const detectedHeaders = csvRowsRes?.isOk()
+      ? csvRowsRes.value.detectedHeaders
+      : undefined;
+
     const enqueueRes = await enqueueUpsertTable({
       upsertTable: {
         workspaceId: owner.sId,
@@ -634,6 +643,7 @@ export async function handleDataSourceTableCSVUpsert({
         csv: csv ?? null,
         truncate,
         useAppForHeaderDetection,
+        detectedHeaders,
       },
     });
     if (enqueueRes.isErr()) {
diff --git a/front/lib/api/tables.ts b/front/lib/api/tables.ts
index 1d255d2dd92a..0f4c58b3b3a8 100644
--- a/front/lib/api/tables.ts
+++ b/front/lib/api/tables.ts
@@ -50,6 +50,8 @@ type NotFoundError = {
   message: string;
 };
 
+type DetectedHeadersType = { header: string[]; rowIndex: number };
+
 export type TableOperationError =
   | {
       type: "internal_server_error";
@@ -130,6 +132,7 @@ export async function upsertTableFromCsv({
   csv,
   truncate,
   useAppForHeaderDetection,
+  detectedHeaders,
 }: {
   auth: Authenticator;
   dataSource: DataSourceResource;
@@ -142,9 +145,15 @@ export async function upsertTableFromCsv({
   csv: string | null;
   truncate: boolean;
   useAppForHeaderDetection: boolean;
+  detectedHeaders?: DetectedHeadersType;
 }): Promise<Result<{ table: CoreAPITable }, TableOperationError>> {
   const csvRowsRes = csv
-    ? await rowsFromCsv({ auth, csv, useAppForHeaderDetection })
+    ? await rowsFromCsv({
+        auth,
+        csv,
+        useAppForHeaderDetection,
+        detectedHeaders,
+      })
     : null;
 
   const owner = auth.workspace();
@@ -188,7 +197,7 @@ export async function upsertTableFromCsv({
       return new Err(errorDetails);
     }
 
-    csvRows = csvRowsRes.value;
+    csvRows = csvRowsRes.value.rows;
   }
 
   if ((csvRows?.length ?? 0) > 500_000) {
@@ -321,11 +330,18 @@ export async function rowsFromCsv({
   auth,
   csv,
   useAppForHeaderDetection,
+  detectedHeaders,
 }: {
   auth: Authenticator;
   csv: string;
   useAppForHeaderDetection: boolean;
-}): Promise<Result<CoreAPIRow[], CsvParsingError>> {
+  detectedHeaders?: DetectedHeadersType;
+}): Promise<
+  Result<
+    { detectedHeaders: DetectedHeadersType; rows: CoreAPIRow[] },
+    CsvParsingError
+  >
+> {
   const delimiter = await guessDelimiter(csv);
   if (!delimiter) {
     return new Err({
@@ -334,12 +350,9 @@ export async function rowsFromCsv({
     });
   }
 
-  const headerRes = await detectHeaders(
-    auth,
-    csv,
-    delimiter,
-    useAppForHeaderDetection
-  );
+  const headerRes = detectedHeaders
+    ? new Ok(detectedHeaders)
+    : await detectHeaders(auth, csv, delimiter, useAppForHeaderDetection);
 
   if (headerRes.isErr()) {
     return headerRes;
@@ -477,12 +490,12 @@ export async function rowsFromCsv({
     rows.push({ row_id: rowId, value: record });
   }
 
-  return new Ok(rows);
+  return new Ok({ detectedHeaders: { header, rowIndex }, rows });
 }
 
 async function staticHeaderDetection(
   firstRow: string[]
-): Promise<Result<{ header: string[]; rowIndex: number }, CsvParsingError>> {
+): Promise<Result<DetectedHeadersType, CsvParsingError>> {
   const firstRecordCells = firstRow.map(
     (h, i) => h.trim().toLocaleLowerCase() || `col_${i}`
   );
@@ -500,7 +513,7 @@ async function detectHeaders(
   csv: string,
   delimiter: string,
   useAppForHeaderDetection: boolean
-): Promise<Result<{ header: string[]; rowIndex: number }, CsvParsingError>> {
+): Promise<Result<DetectedHeadersType, CsvParsingError>> {
   const headParser = parse(csv, { delimiter });
   const records = [];
   for await (const anyRecord of headParser) {
diff --git a/front/lib/upsert_queue.ts b/front/lib/upsert_queue.ts
index a6bbb481469a..090280283d2e 100644
--- a/front/lib/upsert_queue.ts
+++ b/front/lib/upsert_queue.ts
@@ -39,6 +39,11 @@ export const EnqueueUpsertDocument = t.type({
   upsertContext: t.union([UpsertContextSchema, t.null]),
 });
 
+const DetectedHeaders = t.type({
+  header: t.array(t.string),
+  rowIndex: t.number,
+});
+
 export const EnqueueUpsertTable = t.type({
   workspaceId: t.string,
   dataSourceId: t.string,
@@ -51,6 +56,7 @@ export const EnqueueUpsertTable = t.type({
   csv: t.union([t.string, t.null]),
   truncate: t.boolean,
   useAppForHeaderDetection: t.union([t.boolean, t.undefined, t.null]),
+  detectedHeaders: t.union([DetectedHeaders, t.undefined]),
 });
 
 type EnqueueUpsertDocumentType = t.TypeOf<typeof EnqueueUpsertDocument>;
diff --git a/front/temporal/upsert_tables/activities.ts b/front/temporal/upsert_tables/activities.ts
index 7c3e09c520ff..876888141872 100644
--- a/front/temporal/upsert_tables/activities.ts
+++ b/front/temporal/upsert_tables/activities.ts
@@ -88,6 +88,7 @@ export async function upsertTableActivity(
     csv: upsertQueueItem.csv,
     truncate: upsertQueueItem.truncate,
     useAppForHeaderDetection: upsertQueueItem.useAppForHeaderDetection ?? false,
+    detectedHeaders: upsertQueueItem.detectedHeaders,
   });
 
   if (tableRes.isErr()) {