diff --git a/front/src/applications/operationalStudies/components/Scenario/ScenarioContent.tsx b/front/src/applications/operationalStudies/components/Scenario/ScenarioContent.tsx
index 3eb67889417..c1395e4f92f 100644
--- a/front/src/applications/operationalStudies/components/Scenario/ScenarioContent.tsx
+++ b/front/src/applications/operationalStudies/components/Scenario/ScenarioContent.tsx
@@ -1,4 +1,4 @@
-import { useState, useEffect, useCallback } from 'react';
+import { useState, useCallback, useEffect } from 'react';
 
 import { ChevronRight } from '@osrd-project/ui-icons';
 import cx from 'classnames';
@@ -24,7 +24,6 @@ import ScenarioLoaderMessage from 'modules/scenario/components/ScenarioLoaderMes
 import TimetableManageTrainSchedule from 'modules/trainschedule/components/ManageTrainSchedule/TimetableManageTrainSchedule';
 import Timetable from 'modules/trainschedule/components/Timetable/Timetable';
 import { useAppDispatch } from 'store';
-import { concatMap, mapBy } from 'utils/types';
 
 import ScenarioDescription from './ScenarioDescription';
 
@@ -61,6 +60,13 @@ const ScenarioContent = ({
     removeTrains,
   } = useScenarioData(scenario, timetable, infra);
 
+  const [ngeDto, setNgeDto] = useState<NetzgrafikDto>();
+
+  const dtoImport = async () => {
+    const dto = await importTimetableToNGE(scenario.infra_id, scenario.timetable_id, dispatch);
+    setNgeDto(dto);
+  };
+
   const toggleMicroMacroButton = useCallback(
     (isMacroMode: boolean) => {
       setIsMacro(isMacroMode);
@@ -68,40 +74,16 @@ const ScenarioContent = ({
         setCollapsedTimetable(false);
       }
     },
-    [setIsMacro, setCollapsedTimetable, collapsedTimetable]
+    [setIsMacro, collapsedTimetable]
   );
 
-  const [ngeDto, setNgeDto] = useState<NetzgrafikDto>();
-  const [ngeUpsertedTrainSchedules, setNgeUpsertedTrainSchedules] = useState<
-    Map<number, TrainScheduleResult>
-  >(new Map());
-  const [ngeDeletedTrainIds, setNgeDeletedTrainIds] = useState<number[]>([]);
-
-  useEffect(() => {
-    if (!isMacro || (isMacro && ngeDto)) {
-      return;
-    }
-
-    const doImport = async () => {
-      const dto = await importTimetableToNGE(scenario.infra_id, scenario.timetable_id, dispatch);
-      setNgeDto(dto);
-    };
-    doImport();
-  }, [scenario, isMacro]);
-
   useEffect(() => {
     if (isMacro) {
-      return;
-    }
-
-    if (ngeDto) {
-      setNgeDto(undefined);
+      dtoImport();
     }
-    upsertTrainSchedules(Array.from(ngeUpsertedTrainSchedules.values()));
-    removeTrains(ngeDeletedTrainIds);
   }, [isMacro]);
 
-  const handleNGEOperation = (event: NGEEvent, netzgrafikDto: NetzgrafikDto) =>
+  const handleNGEOperation = (event: NGEEvent, netzgrafikDto: NetzgrafikDto) => {
     handleOperation({
       event,
       dispatch,
@@ -109,14 +91,13 @@ const ScenarioContent = ({
       timeTableId: scenario.timetable_id,
       netzgrafikDto,
       addUpsertedTrainSchedules: (upsertedTrainSchedules: TrainScheduleResult[]) => {
-        setNgeUpsertedTrainSchedules((prev) =>
-          concatMap(prev, mapBy(upsertedTrainSchedules, 'id'))
-        );
+        upsertTrainSchedules(upsertedTrainSchedules);
       },
       addDeletedTrainIds: (trainIds: number[]) => {
-        setNgeDeletedTrainIds((prev) => [...prev, ...trainIds]);
+        removeTrains(trainIds);
       },
     });
+  };
 
   return (
     <main className="mastcontainer mastcontainer-no-mastnav">
@@ -146,6 +127,7 @@ const ScenarioContent = ({
                       trainIdToEdit={trainIdToEdit}
                       setTrainIdToEdit={setTrainIdToEdit}
                       infraState={infra.state}
+                      dtoImport={dtoImport}
                     />
                   )}
                   <Timetable
@@ -159,6 +141,7 @@ const ScenarioContent = ({
                     trainIdToEdit={trainIdToEdit}
                     trainSchedules={trainSchedules}
                     trainSchedulesWithDetails={trainScheduleSummaries}
+                    dtoImport={dtoImport}
                   />
                 </>
               )}
diff --git a/front/src/modules/trainschedule/components/ManageTrainSchedule/AddTrainScheduleButton.tsx b/front/src/modules/trainschedule/components/ManageTrainSchedule/AddTrainScheduleButton.tsx
index c98aa18020b..4acbd324077 100644
--- a/front/src/modules/trainschedule/components/ManageTrainSchedule/AddTrainScheduleButton.tsx
+++ b/front/src/modules/trainschedule/components/ManageTrainSchedule/AddTrainScheduleButton.tsx
@@ -24,12 +24,14 @@ type AddTrainScheduleButtonProps = {
   infraState?: InfraState;
   setIsWorking: (isWorking: boolean) => void;
   upsertTrainSchedules: (trainSchedules: TrainScheduleResult[]) => void;
+  dtoImport: () => void;
 };
 
 const AddTrainScheduleButton = ({
   infraState,
   setIsWorking,
   upsertTrainSchedules,
+  dtoImport,
 }: AddTrainScheduleButtonProps) => {
   const [postTrainSchedule] =
     osrdEditoastApi.endpoints.postTimetableByIdTrainSchedule.useMutation();
@@ -83,6 +85,7 @@ const AddTrainScheduleButton = ({
           })
         );
         setIsWorking(false);
+        dtoImport();
         upsertTrainSchedules(newTrainSchedules);
       } catch (e) {
         setIsWorking(false);
diff --git a/front/src/modules/trainschedule/components/ManageTrainSchedule/TimetableManageTrainSchedule.tsx b/front/src/modules/trainschedule/components/ManageTrainSchedule/TimetableManageTrainSchedule.tsx
index b88aeab53bb..9c2518851ac 100644
--- a/front/src/modules/trainschedule/components/ManageTrainSchedule/TimetableManageTrainSchedule.tsx
+++ b/front/src/modules/trainschedule/components/ManageTrainSchedule/TimetableManageTrainSchedule.tsx
@@ -18,6 +18,7 @@ type TimetableManageTrainScheduleProps = {
   upsertTrainSchedules: (trainSchedules: TrainScheduleResult[]) => void;
   infraState?: InfraState;
   setTrainIdToEdit: (trainIdToEdit?: number) => void;
+  dtoImport: () => void;
 };
 
 const TimetableManageTrainSchedule = ({
@@ -27,6 +28,7 @@ const TimetableManageTrainSchedule = ({
   infraState,
   trainIdToEdit,
   setTrainIdToEdit,
+  dtoImport,
 }: TimetableManageTrainScheduleProps) => {
   const { t } = useTranslation('operationalStudies/manageTrainSchedule');
   const [isWorking, setIsWorking] = useState(false);
@@ -41,9 +43,9 @@ const TimetableManageTrainSchedule = ({
     setDisplayTrainScheduleManagement,
     upsertTrainSchedules,
     setTrainIdToEdit,
+    dtoImport,
     trainIdToEdit
   );
-
   return (
     <div className="scenario-timetable-managetrainschedule">
       <div className="scenario-timetable-managetrainschedule-header">
@@ -77,6 +79,7 @@ const TimetableManageTrainSchedule = ({
                 infraState={infraState}
                 setIsWorking={setIsWorking}
                 upsertTrainSchedules={upsertTrainSchedules}
+                dtoImport={dtoImport}
               />
             )}
             <TrainAddingSettings />
diff --git a/front/src/modules/trainschedule/components/ManageTrainSchedule/hooks/useUpdateTrainSchedule.ts b/front/src/modules/trainschedule/components/ManageTrainSchedule/hooks/useUpdateTrainSchedule.ts
index d02188f81b3..99d58445d1b 100644
--- a/front/src/modules/trainschedule/components/ManageTrainSchedule/hooks/useUpdateTrainSchedule.ts
+++ b/front/src/modules/trainschedule/components/ManageTrainSchedule/hooks/useUpdateTrainSchedule.ts
@@ -19,6 +19,7 @@ const useUpdateTrainSchedule = (
   setDisplayTrainScheduleManagement: (type: string) => void,
   upsertTrainSchedules: (trainSchedules: TrainScheduleResult[]) => void,
   setTrainIdToEdit: (trainIdToEdit?: number) => void,
+  dtoImport: () => void,
   trainIdToEdit?: number
 ) => {
   const { t } = useTranslation(['operationalStudies/manageTrainSchedule']);
@@ -50,8 +51,8 @@ const useUpdateTrainSchedule = (
           id: trainIdToEdit,
           trainScheduleForm: trainSchedule,
         }).unwrap();
-
         upsertTrainSchedules([trainScheduleResult]);
+        dtoImport();
         dispatch(
           setSuccess({
             title: t('trainUpdated'),
diff --git a/front/src/modules/trainschedule/components/Timetable/Timetable.tsx b/front/src/modules/trainschedule/components/Timetable/Timetable.tsx
index fd1aa410ac0..1d2579aa573 100644
--- a/front/src/modules/trainschedule/components/Timetable/Timetable.tsx
+++ b/front/src/modules/trainschedule/components/Timetable/Timetable.tsx
@@ -28,6 +28,7 @@ type TimetableProps = {
   trainIdToEdit?: number;
   trainSchedules?: TrainScheduleResult[];
   trainSchedulesWithDetails: TrainScheduleWithDetails[];
+  dtoImport: () => void;
 };
 
 const formatDepartureDate = (d: Date) => dayjs(d).locale(i18n.language).format('dddd D MMMM YYYY');
@@ -43,6 +44,7 @@ const Timetable = ({
   trainIdToEdit,
   trainSchedules = [],
   trainSchedulesWithDetails,
+  dtoImport,
 }: TimetableProps) => {
   const { t } = useTranslation(['operationalStudies/scenario', 'common/itemTypes']);
 
@@ -160,6 +162,7 @@ const Timetable = ({
               projectionPathIsUsed={
                 infraState === 'CACHED' && trainIdUsedForProjection === train.id
               }
+              dtoImport={dtoImport}
             />
           </div>
         ))}
diff --git a/front/src/modules/trainschedule/components/Timetable/TimetableTrainCard.tsx b/front/src/modules/trainschedule/components/Timetable/TimetableTrainCard.tsx
index 2bc25621fc5..02341a5a559 100644
--- a/front/src/modules/trainschedule/components/Timetable/TimetableTrainCard.tsx
+++ b/front/src/modules/trainschedule/components/Timetable/TimetableTrainCard.tsx
@@ -34,6 +34,7 @@ type TimetableTrainCardProps = {
   setTrainIdToEdit: (trainIdToEdit?: number) => void;
   removeTrains: (trainIds: number[]) => void;
   projectionPathIsUsed: boolean;
+  dtoImport: () => void;
 };
 
 const formatFullDate = (d: Date) => dayjs(d).format('D/MM/YYYY HH:mm:ss');
@@ -50,6 +51,7 @@ const TimetableTrainCard = ({
   setTrainIdToEdit,
   removeTrains,
   projectionPathIsUsed,
+  dtoImport,
 }: TimetableTrainCardProps) => {
   const { t } = useTranslation(['operationalStudies/scenario']);
   const dispatch = useAppDispatch();
@@ -81,6 +83,7 @@ const TimetableTrainCard = ({
       .unwrap()
       .then(() => {
         removeTrains([train.id]);
+        dtoImport();
         dispatch(
           setSuccess({
             title: t('timetable.trainDeleted', { name: train.trainName }),
@@ -125,6 +128,7 @@ const TimetableTrainCard = ({
           body: [newTrain],
         }).unwrap();
         upsertTrainSchedules([trainScheduleResult]);
+        dtoImport();
         dispatch(
           setSuccess({
             title: t('timetable.trainAdded'),