diff --git a/module/item.js b/module/item.js
index 21db5b80..26b0fb7e 100644
--- a/module/item.js
+++ b/module/item.js
@@ -195,9 +195,15 @@ export class RdDItem extends Item {
     if (itemData.name != otherData.name) return false;
     if (tplData.quantite == undefined) return false;
 
-    for (const [key, value] of Object.entries(tplData)) {
-      if (['quantite', 'encTotal', 'prixTotal', 'cout'].includes(key)) continue;
-      if (value != otherTplData[key]) return false;
+    const differences = Object.entries(tplData).filter(([key, value]) => !['quantite', 'encTotal', 'prixTotal', 'cout'].includes(key))
+      .filter(([key, value]) => value != otherTplData[key]);
+    if (differences.length > 0) {
+      let message = `Impossible de regrouper les ${itemData.type} ${itemData.name}: `;
+      for (const [key, value] of differences){
+        message += `<br>${key}: ${value} vs ${otherTplData[key]}`;
+      }
+      ui.notifications.info(message)
+      return false;
     }
     return true;
   }