App not installing on android

This is a thunkable project

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If you already installed the app then this message comes up when you try to install a wrong update.

Do you have the app already installed?

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I suggest you update the title of your post to something more descriptive.

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Delete the previous version of the app installed on your device, and try again.

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I’ve changed the title of your topic to be more clear and descriptive for users.
Anyways have you tried deleting the previous version and re-installing the latest version?
This ussualy works for me.

This may be more of an issue with the phone rather than Thunkable.