I need to replace existing company messenger bot with a new one. It is my first time when I am working with Facebook for developers, so I am a newbie. Could you help me and answer few questions? I tried to find them on the internet, but unfortunately, it is the first time I could not find something.
1) Could I deploy messenger bot from other developer application than current? I mean that I do not have access to current developer application, could I create a new app and deploy it to our page from that app?
2) Could I deploy new messenger bot without replacing the old one? If yes then could they coexist? I would like to choose users who will talk with a new bot, and the rest will speak with the old bot.
3) Do I need to submit my whole app for review? Alternatively, could I only review messenger app?
4) If I pass messenger bot review, then could I replace a fan page associated with the bot?
Thank you very much in advance :)