I suddenly can't upload APK to Google, which has been going well so far."An APK with version code 3 already exists, so you must use a different version code."
However, the version of AndroidManifest.xml that sets the version code is android:versionCode="4".
Please let me know if there are any other places to set the version code.
Didn't you raise the version number?
Settings > Build Settings (Android App Settings) > Version
The above version number must be higher than the previous app you uploaded.
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