I made the same mistake and called IRCC, the person asked their supervisor and then assured that it was recent enough there shouldn't be an issue.Only now I noticed that I used 2 outdated Forms IMM_5406e 09-2018 (updated 08-2020) and IMM_5669e 11-2018 (updated 06-2019). Will this delay the processing and make them return my application. The forms in the Guide that I used weren't updated yet. Thanks for the reply.