diff --git a/src/main/java/org/gcube/datacatalogue/catalogue/utils/CatalogueUtils.java b/src/main/java/org/gcube/datacatalogue/catalogue/utils/CatalogueUtils.java
index 9228deb..8cbd5e7 100644
--- a/src/main/java/org/gcube/datacatalogue/catalogue/utils/CatalogueUtils.java
+++ b/src/main/java/org/gcube/datacatalogue/catalogue/utils/CatalogueUtils.java
@@ -750,7 +750,7 @@ public class CatalogueUtils {
 				}
 
 				if(!match)
-					throw new Exception("Field with key '" + key + " doesn't match any of the vocabulary's values!");
+					throw new Exception("Field with key '" + key + "' has a value '" + value + "' but it doesn't match any of the vocabulary's values!");
 
 			}