Help/Support I can't update an app because I deleted my apple id I downloaded it with

[flo_zn 0 iPhone Xr 13.2]

So basically, I can't play or save Bleach Brave Souls right now because I have to update it. But I can't, because I deleted the Apple ID I downloaded it with. I have to reinstall it in order to update it, but I forgot to save my game data somehow. Can I download the new versions ipa from somewhere and just update it with an application or something on my iPhone? It's jailbroken btw. Thanks for your help! 

[Laxus 786.3k iPhone 5s 10.3.3]

Hmm iirc the game is online so you can save your progress with gaem center or fb/google

You can also try using apps manager to backup your app data aswell

[flo_zn 0 iPhone Xr 13.2]

I can’t save it because I need to update it first, and thats what I can’t do 

how can I backup the app data?