I updated my 1756 to 1774 and while installing it mentioned the old app with the old certificate will not be launched so I switched to another AppleID to sign a new app and instaled it on my ipad. The new app can be lauched but the old one, where I have a guest account cannot bo launched because it cannot be verified. As I dont wanna lose my giest account again, I deleted the new account and relogin my old appleID and installed again 1774 to override the old app on my ipad. Then when lauching this error showed up. Why Cheto thinks I am using a different device? It's so annoying and buggy.