diff --git a/src/pages/exploitations/[id]/modifier/[featureId].vue b/src/pages/exploitations/[id]/modifier/[featureId].vue
index 83a5befe..ed093b44 100644
--- a/src/pages/exploitations/[id]/modifier/[featureId].vue
+++ b/src/pages/exploitations/[id]/modifier/[featureId].vue
@@ -19,6 +19,9 @@ meta:
 
     <div class="fr-grid-row fr-grid-row--gutters">
       <div class="fr-col-9">
+        <div v-if="loadingError" class="fr-alert fr-alert--error fr-my-3v">
+          <p>{{ loadingError }}</p>
+        </div>
         <MapContainer v-if="recordStore.isSetup" :options="{ interactive: true }" class="map" :bounds="mapBounds" ref="map" >
           <GeojsonLayer :style="baseStyle" name="base" />
           <GeojsonLayer :data="otherCollection" name="parcellaire-operateur" />
@@ -34,15 +37,15 @@ meta:
           <button
               class="fr-btn fr-btn--tertiary-no-outline fr-btn--icon-left fr-icon-arrow-go-back-fill fr-mb-4w"
               @click="reset"
-              :disabled="feature === null"
+              :disabled="loadingError || feature === null"
           >
             Réinitialiser le tracé</button>
-          <div v-if="error" class="fr-alert fr-alert--error">
+          <div v-if="!loadingError && error" class="fr-alert fr-alert--error">
             <p>{{ error }}</p>
           </div>
           <button
               class="fr-btn fr-btn--primary fr-btn--icon-left fr-icon-save-fill"
-              :disabled="error !== ''"
+              :disabled="error !== '' || loadingError !== ''"
               @click="showConfirmModal = true"
           >
             Enregistrer le tracé
@@ -107,7 +110,7 @@ const permissions = usePermissions()
 const messages = useMessages()
 const router = useRouter()
 
-const otherCollection = computed(() => featureCollection(
+const otherCollection = computed(() => loadingError.value ? featureStore.collection : featureCollection(
     featureStore.collection.features.filter(f => f.id !== Number(props.featureId)))
 )
 const modifiedFeature = ref(null)
@@ -122,6 +125,7 @@ const mapBounds = computed(() => {
 
 const map = ref(null) // MapContainer instance
 let draw // TerraDraw instance
+const loadingError = ref('')
 const error = ref('')
 const showConfirmModal = ref(false)
 
@@ -183,7 +187,15 @@ function loadFeature () {
       coord => coord.map(c => c.map(n => Number(n.toFixed(COORDINATE_PRECISION - 1))))
   )
   terraDrawFeature.properties.mode = 'polygon'
-  draw.addFeatures([terraDrawFeature])
+  try {
+    draw.addFeatures([terraDrawFeature])
+  } catch (e) {
+    if (e.message.startsWith('Feature is not')) {
+      loadingError.value = 'La modification de contour n’est pas encore disponible pour les parcelles évidées. Veuillez nous en excuser.'
+    } else {
+      throw e
+    }
+  }
 
   // Clone feature to avoid modifying the featureStore
   modifiedFeature.value = JSON.parse(JSON.stringify(featureStore.getFeatureById(Number(props.featureId))))