INSTALL PARSE FAILED INCONSISTENT CERTIFICATES error solution

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A prompt similar to INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES appears when installing the APK file, along with the following similar prompt:
Android Launch!
adb is running norm.
Performing com. android123.cwj activity launch
Automatic Target Mode: Using device ‘HT840GZ25974’
Uploading CWJ. Apk onto device ‘HT840GZ25974’
Uploading
Application already exists. Attempting to re – install home…
re-installation failed due to different application signatures.
You must perform a full uninstall of the application. WARNING: This will remove the application data! Android123.cwj ‘in a shell.
Launch canceled!
Such problems mainly due to signature conflict, such as you use the ADB debug permissions signature, but then use standard sign signature and then install the same file will appear such errors, the solution in addition to honestly uninstall the original version to install again from the mobile phone, the ADB install – r parameter can’t solve this problem.            

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