diff --git a/app/pages/component-catalog.vue b/app/pages/component-catalog.vue
index f653435..d2ce710 100644
--- a/app/pages/component-catalog.vue
+++ b/app/pages/component-catalog.vue
@@ -180,6 +180,30 @@ const resolvePreviewAlt = (component: Record<string, any>) => {
   return 'Aperçu du document'
 }
 
+const resolveDeleteBlockingReasons = (component: Record<string, any>) => {
+  const reasons: string[] = []
+  const machineLinks = Array.isArray(component?.machineLinks)
+    ? component.machineLinks.length
+    : component?.machineLinksCount ?? 0
+  const documents = Array.isArray(component?.documents)
+    ? component.documents.length
+    : component?.documentsCount ?? 0
+  const customFields = Array.isArray(component?.customFieldValues)
+    ? component.customFieldValues.length
+    : component?.customFieldValuesCount ?? 0
+
+  if (machineLinks > 0) {
+    reasons.push(`${machineLinks} liaison${machineLinks > 1 ? 's' : ''} machine`)
+  }
+  if (documents > 0) {
+    reasons.push(`${documents} document${documents > 1 ? 's' : ''}`)
+  }
+  if (customFields > 0) {
+    reasons.push(`${customFields} valeur${customFields > 1 ? 's' : ''} de champ personnalisé`)
+  }
+  return reasons
+}
+
 const resolveComparableName = (component: Record<string, any>) => {
   const toComparable = (value?: string | null) =>
     (value ?? '').toString().trim().toLowerCase()
@@ -235,13 +259,14 @@ const visibleComposants = computed(() => {
 })
 
 const handleDeleteComponent = async (component: Record<string, any>) => {
-  const hasLinkedElements =
-    (component?.machineLinks?.length ?? 0) > 0 ||
-    (component?.documents?.length ?? 0) > 0 ||
-    (component?.customFieldValues?.length ?? 0) > 0
+  const blockingReasons = resolveDeleteBlockingReasons(component)
 
-  if (hasLinkedElements) {
-    showError('Impossible de supprimer ce composant car il possède des éléments liés.')
+  if (blockingReasons.length) {
+    showError(
+      `Impossible de supprimer ce composant car il possède encore: ${blockingReasons.join(
+        ', ',
+      )}. Supprimez ou détachez ces éléments avant de réessayer.`
+    )
     return
   }
 
diff --git a/app/pages/pieces-catalog.vue b/app/pages/pieces-catalog.vue
index 6530c14..202cc55 100644
--- a/app/pages/pieces-catalog.vue
+++ b/app/pages/pieces-catalog.vue
@@ -182,6 +182,30 @@ const resolvePreviewAlt = (piece: Record<string, any>) => {
   return 'Aperçu du document'
 }
 
+const resolveDeleteBlockingReasons = (piece: Record<string, any>) => {
+  const reasons: string[] = []
+  const machineLinks = Array.isArray(piece?.machineLinks)
+    ? piece.machineLinks.length
+    : piece?.machineLinksCount ?? 0
+  const documents = Array.isArray(piece?.documents)
+    ? piece.documents.length
+    : piece?.documentsCount ?? 0
+  const customFields = Array.isArray(piece?.customFieldValues)
+    ? piece.customFieldValues.length
+    : piece?.customFieldValuesCount ?? 0
+
+  if (machineLinks > 0) {
+    reasons.push(`${machineLinks} liaison${machineLinks > 1 ? 's' : ''} machine`)
+  }
+  if (documents > 0) {
+    reasons.push(`${documents} document${documents > 1 ? 's' : ''}`)
+  }
+  if (customFields > 0) {
+    reasons.push(`${customFields} valeur${customFields > 1 ? 's' : ''} de champ personnalisé`)
+  }
+  return reasons
+}
+
 const resolveComparableName = (piece: Record<string, any>) => {
   const normalise = (value?: string | null) =>
     (value ?? '').toString().trim().toLowerCase()
@@ -237,13 +261,14 @@ const visiblePieces = computed(() => {
 })
 
 const handleDeletePiece = async (piece: Record<string, any>) => {
-  const hasLinkedElements =
-    (piece?.machineLinks?.length ?? 0) > 0 ||
-    (piece?.documents?.length ?? 0) > 0 ||
-    (piece?.customFieldValues?.length ?? 0) > 0
+  const blockingReasons = resolveDeleteBlockingReasons(piece)
 
-  if (hasLinkedElements) {
-    showError('Impossible de supprimer cette pièce car elle possède des éléments liés.')
+  if (blockingReasons.length) {
+    showError(
+      `Impossible de supprimer cette pièce car elle possède encore: ${blockingReasons.join(
+        ', ',
+      )}. Supprimez ou détachez ces éléments avant de réessayer.`
+    )
     return
   }