/Shell/Bash/Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.ccc.notification signatures do not match previously installed version; ignoring!]

Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.ccc.notification signatures do not match previously installed version; ignoring!]

try uninstalling the app. I met this problem on my project too.
This helped me, so hopefuly will help someone else:
adb uninstall "com.domain.yourapp"

############### OR #########################

try replacing the current version with the previous one
adb install -r -d "PATH_TO_APK\APP_NAME.apk"

-r: Reinstall an exisiting app, keeping its data.
-d: Allow version code downgrade.

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