You need to uninstall the previous version from your phone.
Also this is duplicate posting. You already posted in AppToMarket forum
Is AppTo Market V32 compatible with .apk files created in App inventor 2? I have decompiled my .apk file and replaced images (low resolution) with images of higher resolution using same filenames. When I send the new .apk file to my phone it fails to install after download to the device. Any ideas?
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