diff --git a/pkg/quickwit/client/client.go b/pkg/quickwit/client/client.go
index 36059b2..f24bce7 100644
--- a/pkg/quickwit/client/client.go
+++ b/pkg/quickwit/client/client.go
@@ -168,7 +168,6 @@ func (c *baseClientImpl) ExecuteMultisearch(r *MultiSearchRequest) (*MultiSearch
 
 	if res.StatusCode >= 400 {
 		qe := QuickwitQueryError{
-			Key:          "msearch",
 			Status:       res.StatusCode,
 			Message:      "Error on multisearch",
 			ResponseBody: res.Body,
diff --git a/pkg/quickwit/client/models.go b/pkg/quickwit/client/models.go
index 178c97e..e4769e1 100644
--- a/pkg/quickwit/client/models.go
+++ b/pkg/quickwit/client/models.go
@@ -46,7 +46,6 @@ type SearchResponseHits struct {
 
 type QuickwitQueryError struct {
 	Status       int              `json:"status"`
-	Key          string           `json:"key"`
 	Message      string           `json:"message"`
 	ResponseBody io.ReadCloser    `json:"response_body"`
 	RequestBody  []*SearchRequest `json:"request_body"`
diff --git a/pkg/quickwit/data_query.go b/pkg/quickwit/data_query.go
index e84ae8f..788f86a 100644
--- a/pkg/quickwit/data_query.go
+++ b/pkg/quickwit/data_query.go
@@ -28,7 +28,7 @@ var newElasticsearchDataQuery = func(client es.Client, dataQuery []backend.DataQ
 	}
 }
 
-func handleQuickwitErrors(err error) (*backend.QueryDataResponse, error) {
+func handleQuickwitErrors(e *elasticsearchDataQuery, err error) (*backend.QueryDataResponse, error) {
 	if nil == err {
 		return nil, nil
 	}
@@ -44,7 +44,7 @@ func handleQuickwitErrors(err error) (*backend.QueryDataResponse, error) {
 		Responses: backend.Responses{},
 	}
 
-	result.Responses[qe.Key] = backend.ErrDataResponse(backend.Status(qe.Status), payload)
+	result.Responses[e.dataQueries[0].RefID] = backend.ErrDataResponse(backend.Status(qe.Status), payload)
 	return &result, nil
 }
 
@@ -70,7 +70,7 @@ func (e *elasticsearchDataQuery) execute() (*backend.QueryDataResponse, error) {
 	}
 
 	res, err := e.client.ExecuteMultisearch(req)
-	result, err := handleQuickwitErrors(err)
+	result, err := handleQuickwitErrors(e, err)
 	if result != nil {
 		return result, nil
 	} else if err != nil {