diff --git a/scripts/upgrade b/scripts/upgrade
index 924f75d..160f3cc 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -67,6 +67,9 @@ if ynh_legacy_permissions_exists; then
 
 	ynh_app_setting_delete --app=$app --key=is_public
 
+fi
+
+if ! ynh_permission_exists --permission="admin"; then
 	# Create the required permissions
 	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
 fi