Also since you are targeting one record with "objChangeRequest.addQuery("sys_id", "bfb14d900fa0d74032854d6a42050e38");

There really isn't any reason to use orderByDesc("sys_created_on");

• Also you should be wrapping your next() method in an if or while statement to prevent any unneeded code from running.

Also you should mentioned that using,

objChangeRequest.setWorkflow(false);

objChangeRequest.autoSysFields(false);

Will prevent other Business rules from running and system fields not being updated. To avoid new developers from being mislead or confused by the use of these methods.