diff --git a/front/public/locales/en/translation.json b/front/public/locales/en/translation.json
index cf31a2b37c7..3f8a39c1e23 100644
--- a/front/public/locales/en/translation.json
+++ b/front/public/locales/en/translation.json
@@ -435,6 +435,7 @@
           "select-track": "Select a line on the map"
         },
         "label": "Switch tool",
+        "duplicate-errors": "The track {{track}} is already used by the port {{port}}",
         "no-track-picked-yet": "No line selected yet",
         "switch-type": "Switch type",
         "untitled-track": "Untitled track"
diff --git a/front/public/locales/fr/translation.json b/front/public/locales/fr/translation.json
index 084ad229e9a..e419b439ea1 100644
--- a/front/public/locales/fr/translation.json
+++ b/front/public/locales/fr/translation.json
@@ -434,6 +434,7 @@
           "no-move": "Les aiguillages ne peuvent pas être déplacés, et sont automatiquement placés sur leur premier port.",
           "select-track": "Sélectionnez une ligne sur la carte"
         },
+        "duplicate-errors": "Le track {{track}} est déjà utilisé par le port {{port}}",
         "label": "Outil \"Aiguillage\"",
         "no-track-picked-yet": "Aucune ligne n'a encore été sélectionnée",
         "switch-type": "Type d'aiguillage",
diff --git a/front/src/applications/editor/tools/switchEdition/components.tsx b/front/src/applications/editor/tools/switchEdition/components.tsx
index 4f3000d24aa..ca6cd83c9fe 100644
--- a/front/src/applications/editor/tools/switchEdition/components.tsx
+++ b/front/src/applications/editor/tools/switchEdition/components.tsx
@@ -5,7 +5,7 @@ import Select from 'react-select';
 import { Layer, Popup, Source } from 'react-map-gl/maplibre';
 import nearestPoint from '@turf/nearest-point';
 import { featureCollection, point } from '@turf/helpers';
-import { first, last, debounce } from 'lodash';
+import { first, last, debounce, groupBy, filter } from 'lodash';
 import type { Position } from 'geojson';
 
 import type { SwitchEntity, TrackSectionEntity } from 'types';
@@ -94,6 +94,15 @@ export const SwitchEditionLeftPanel = () => {
         }}
         onSubmit={async (flatSwitch) => {
           const entityToSave = flatSwitchToSwitch(switchType, flatSwitch as FlatSwitchEntity);
+          const detectedDuplicates = filter(
+            groupBy(entityToSave.properties.ports, 'track'),
+            (v, _) => v.length > 1
+          );
+
+          if (detectedDuplicates.length > 0) {
+            throw new Error(t('Editor.infra-errors.error-type.node_endpoints_not_unique.name'));
+          }
+
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
           const res: any = await dispatch(
             save(
diff --git a/front/src/applications/editor/tools/switchEdition/components/TrackSectionEndpointSelector.tsx b/front/src/applications/editor/tools/switchEdition/components/TrackSectionEndpointSelector.tsx
index 72cfffaf64d..dc26d24003b 100644
--- a/front/src/applications/editor/tools/switchEdition/components/TrackSectionEndpointSelector.tsx
+++ b/front/src/applications/editor/tools/switchEdition/components/TrackSectionEndpointSelector.tsx
@@ -1,4 +1,4 @@
-import React, { useCallback, useContext, useEffect, useState } from 'react';
+import React, { useCallback, useContext, useEffect, useMemo, useState } from 'react';
 import { useDispatch } from 'react-redux';
 import Select from 'react-select';
 import { useTranslation } from 'react-i18next';
@@ -29,6 +29,18 @@ const TrackSectionEndpointSelector = ({ schema, formData, onChange, name }: Fiel
   const { state, setState } = useContext(
     EditorContext
   ) as ExtendedEditorContextType<SwitchEditionState>;
+
+  const duplicateWith = useMemo(() => {
+    const ports = Object.entries(state.entity.properties?.ports ?? {}).map(([k, v]) => ({
+      ...v,
+      port: k,
+      name: `port::${k}`,
+    }));
+    const currentPort = ports.find((p) => p.name === name);
+    const othersPorts = ports.filter((p) => p.name !== name);
+    return othersPorts.filter((p) => p.track === currentPort?.track);
+  }, [state.entity.properties]);
+
   const { t } = useTranslation();
   const infraID = useInfraID();
 
@@ -89,6 +101,14 @@ const TrackSectionEndpointSelector = ({ schema, formData, onChange, name }: Fiel
     <div className="mb-4">
       {schema.title && <h5>{schema.title}</h5>}
       {schema.description && <p>{schema.description}</p>}
+      {duplicateWith.map(({ track, port }) => (
+        <div className="text-danger small font-weight-bold">
+          {t('Editor.tools.switch-edition.duplicate-errors', {
+            track,
+            port,
+          })}
+        </div>
+      ))}
       <div className="d-flex flex-row align-items-center mb-2">
         <div className="flex-grow-1 flex-shrink-1 mr-2">
           {trackSection ? (