diff --git a/src/main/java/org/gcube/portal/oidc/lr62/UserSitesToGroupsAndRolesMapper.java b/src/main/java/org/gcube/portal/oidc/lr62/UserSitesToGroupsAndRolesMapper.java
index 614c165..9c725c0 100644
--- a/src/main/java/org/gcube/portal/oidc/lr62/UserSitesToGroupsAndRolesMapper.java
+++ b/src/main/java/org/gcube/portal/oidc/lr62/UserSitesToGroupsAndRolesMapper.java
@@ -122,11 +122,11 @@ public class UserSitesToGroupsAndRolesMapper {
             }
             actualSiteGroupId = groupManager.getGroupId(actualSite.getName());
         } catch (UserManagementSystemException | GroupRetrievalFault e) {
-            log.error("Cannot retrieve group for site: " + actualSite.getName(), e);
+            log.warn("Cannot retrieve group for site: " + actualSite.getName(), e);
             return;
         }
         if (actualSiteGroupId < 0) {
-            log.info("Retrieved group id is not valid for the site: " + actualSite.getName());
+            log.warn("Retrieved group id is not valid for the site: " + actualSite.getName());
             return;
         }
         try {