diff --git a/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/CommonServiceUtils.java b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/CommonServiceUtils.java
index 2b2d6a3..a2c7769 100644
--- a/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/CommonServiceUtils.java
+++ b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/CommonServiceUtils.java
@@ -184,7 +184,7 @@ public class CommonServiceUtils {
 									String finalTag = asList.get(i).toString().trim().replaceAll(Constants.REGEX_TAGS,
 											"");
 									if(finalTag.length() > TAG_MAX_SIZE) {
-										finalTag.substring(0, TAG_MAX_SIZE-1);
+										finalTag = finalTag.substring(0, TAG_MAX_SIZE-1);
 									}
 									tags.add(finalTag);
 								}
@@ -194,7 +194,7 @@ public class CommonServiceUtils {
 									String finalTag = asList.get(i).toString().trim().replaceAll(Constants.REGEX_TAGS,
 											"");
 									if(finalTag.length() > TAG_MAX_SIZE) {
-										finalTag.substring(0, TAG_MAX_SIZE-1);
+										finalTag = finalTag.substring(0, TAG_MAX_SIZE-1);
 									}
 									tags.add(finalTag);
 								}
@@ -205,7 +205,7 @@ public class CommonServiceUtils {
 						String finalTag = f.toString().trim().replaceAll(Constants.REGEX_TAGS, "");
 						logger.debug(finalTag);
 						if(finalTag.length() > TAG_MAX_SIZE) {
-							finalTag.substring(0, TAG_MAX_SIZE-1);
+							finalTag = finalTag.substring(0, TAG_MAX_SIZE-1);
 						}
 						tags.add(finalTag);
 					}