Bugfix

classes/manager/process_manager.php

@@ -159,7 +159,7 @@ class process_manager {
      * @param process $process process the rollback should be triggered for.
      */
     public static function rollback_process($process) {
-        for ($i = $process->stepindex - 1; $i >= 1; $i++) {
+        for ($i = $process->stepindex - 1; $i >= 1; $i--) {
             $step = step_manager::get_step_instance_by_workflow_index($process->workflowid, $i);
             $lib = lib_manager::get_step_lib($step->subpluginname);
             try {