I have given correct advise as provide by IRCC. This is what I have seen IRCC itself mention over and over on Twitter, you can look through their tweets . A few people have asked the same question and IRCC say there's no problem changing program within the same DLI. Only changes to DLI require you to inform them prior to your SP being approved, or a re-application if already approved. I remember reading from one of their replies that the only time you'll need to inform IRCC about a change in program if your previous one had a co-op and the new one doesn't require it.
If you look at the screenshot below, the change in policy is referring to when you change school only.