diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 055ee8f29..74a626597 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -483,28 +483,30 @@ def app_upgrade(app=[], url=None, file=None, force=False):
         app_current_version = app_dict.get("version", "?")
 
         if manifest.get('integration', {}).get("upgrade_only_if_version_changes", None) is True:
-
-            # do only the upgrade if there are a change
-            if version.parse(app_current_version) >= version.parse(app_new_version) and not force:
-                logger.success(m18n.n('app_already_up_to_date', app=app_instance_name))
-                # Save update time
-                now = int(time.time())
-                app_setting(app_instance_name, 'update_time', now)
-                app_setting(app_instance_name, 'current_revision', manifest.get('remote', {}).get('revision', "?"))
-                continue
-            elif version.parse(app_current_version) > version.parse(app_new_version):
-                upgrade_type = "DOWNGRADE_FORCED"
-            elif app_current_version == app_new_version:
-                upgrade_type = "UPGRADE_FORCED"
-            elif "~ynh" in app_current_version and "~ynh" in app_new_version:
-                app_current_version_upstream, app_current_version_pkg = app_current_version.split("~ynh")
-                app_new_version_upstream, app_new_version_pkg = app_new_version.split("~ynh")
-                if app_current_version_upstream == app_new_version_upstream:
-                    upgrade_type = "UPGRADE_PACKAGE"
-                elif app_current_version_pkg == app_new_version_pkg:
-                    upgrade_type = "UPGRADE_APP"
+            if "~ynh" in app_current_version and "~ynh" in app_new_version:
+                if version.parse(app_current_version) >= version.parse(app_new_version) and not force:
+                    # No new version available
+                    logger.success(m18n.n('app_already_up_to_date', app=app_instance_name))
+                    # Save update time
+                    now = int(time.time())
+                    app_setting(app_instance_name, 'update_time', now)
+                    app_setting(app_instance_name, 'current_revision', manifest.get('remote', {}).get('revision', "?"))
+                    continue
+                elif version.parse(app_current_version) > version.parse(app_new_version):
+                    upgrade_type = "DOWNGRADE_FORCED"
+                elif app_current_version == app_new_version:
+                    upgrade_type = "UPGRADE_FORCED"
                 else:
-                    upgrade_type = "UPGRADE_FULL"
+                    app_current_version_upstream, app_current_version_pkg = app_current_version.split("~ynh")
+                    app_new_version_upstream, app_new_version_pkg = app_new_version.split("~ynh")
+                    if app_current_version_upstream == app_new_version_upstream:
+                        upgrade_type = "UPGRADE_PACKAGE"
+                    elif app_current_version_pkg == app_new_version_pkg:
+                        upgrade_type = "UPGRADE_APP"
+                    else:
+                        upgrade_type = "UPGRADE_FULL"
+            else:
+                logger.warning("/!\\ Packagers ! You have enabled the setting 'upgrade_only_if_version_changes' but you haven't used the official way to define the package version")
 
         # Check requirements
         _check_manifest_requirements(manifest, app_instance_name=app_instance_name)