Lakesyd

If this was answered earlier, I apologize for repeat question but I’m new to understanding trackable logging. The TI Math trackable I would like to log to get the souvenir but I’ve already found the cache where it currently is. If I go back to the cache where it is and hit log trackable and take a photo I’ve seen it, will it recognize that I found the trackable and still award the souvenir or since icache has already been found I can’t log it after the fact?